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The
Philosophy of Immanuel Kant
Kantian Criticism
represents an attempt to unify Rationalism and
Empiricism in a superior kind of phenomenalism.
This superior phenomenalism consists in considering
the human spirit as endowed with a priori forms,
which are the subjective means of organizing the
data of experience into perfect knowledge. Beyond
these a priori forms there is no perfect science.
Hence any metaphysics is impossible.
The philosophy is
called "Criticism" (from the Greek "krinein -- to
judge") because of the solution given to the
problem of knowledge by means of different
judgments. The result of Kant's Criticism is
evident in all subsequent thought.
Immanuel
Kant
(1724-1804)
Immanuel Kant (picture)
was born in Konigsberg in East Prussia on April 22,
1724. He began his studies at the Collegium
Fredericianum, one of the celebrated centers of
German Pietism. Later he enrolled in the school of
philosophy at the University of Konigsberg, where
he studied the rationalistic philosophy of Wolff
and the mathematics and physics of Newton. On
leaving the University he spent nine years as tutor
in several distinguished families. In 1755 he
became privat docent in the university by
appointment. He was appointed professor of logic
and mathematics in 1770, retiring from his
professorship in 1797. Kant never traveled beyond
the immediate vicinity of his native town.
Kant's chief works are the Critique of Pure
Reason, in which he examines human reason and
concludes that it is capable of constructing
science but not metaphysics. In 1783 he published
the Prolegomena or Prologues to Any Future
Metaphysics, wherein he examines the problem
from another point of view. In 1785 his
Foundation for the Metaphysics of Ethics
appeared, followed by the Critique of Practical
Reason, in which he treats the moral problem
according to the principles of transcendental
criticism. In his Critique of Judgment he
examines the problem of finalism in nature and the
aesthetic problem. The three Critiques form
a single masterpiece and are an exposition of
Kant's definitive thought.
KANT'S PHILOSOPHICAL
PROBLEM
Kant's problem is to present a theory of
knowledge securing the just claims of reason and
investigating the possibilities of knowledge in its
sources, extent, and boundaries. His rationalism
(contributed by Wolff), and his attraction for
English empiricism, had stirred his own thinking.
His philosophical conclusions must penetrate the
various currents of his age -- the Enlightenment,
empiricism, skepticism, and mysticism. His problem
becomes therefore:
- To limit the skepticism of Hume; and
- To destroy materialism, fatalism, and
atheism.
KANT'S CONCEPTION OF
KNOWLEDGE
Knowledge, Kant maintained, is universal and
necessary. He agrees with the rationalists that
such knowledge is in physics and mathematics. He
agrees with the empiricists that knowledge is ideal
knowledge, knowledge of phenomena, knowledge as it
appears to our senses, not knowledge of things as
they are in themselves. Hence a rational
metaphysics is impossible.
Kant contends with the empiricists that we can
know only what we experience, that sensation forms
the material of our knowledge. He agrees with the
rationalists that universal and necessary truth
cannot be derived from experience. So:
- The senses furnish the groundwork of
knowledge;
- The mind arranges knowledge by its own
nature.
We have, therefore:
- Universal and necessary knowledge of the
order of ideas (rationalism);
- No knowledge of things-in-themselves
(skepticism);
- The Contents of our knowledge are derived
from experience (empiricism);
- But the mind thinks its experiences,
conceives them according to its a priori or
rational ways (rationalism);
- We can think things but not know the facts
of the empirical world.
- The moral consciousness (practical reason)
enables us to know God, freedom, and
immortality. Otherwise they would be unanswered.
All we would know would be causal space and
time-order.
Thus we discover two anti-intellectualistic
strains in Kant, one proceeding from the skepticism
of Hume, and the second from Neoplatonism. The
skepticism of Hume gave Kant good reason for
distrusting physical science as a complete
explanation of knowledge. The Neoplatonic strain
posited a supra-rational self which for Kant
created relational links in the world of ethics.
Kant's examination of Humean skepticism gave him
the desire to investigate the possibility of
knowledge. Knowledge, Kant declared, may be
considered under two aspects:
- The sensory, which corresponds to
what-we-perceive, the data of experience;
and
- The logical, which corresponds to
what we think about this experience. (Example:
To perceive a color is sensory, to
discriminate a color from among other colors is
logical.)
Kant regarded sensations as interrelated and not
as isolated raw products of the senses:
- Sense data are always arranged in
space;
- Perceptual experiences vary but the mind can
abstract from them their individual
characteristics. Two things remain -- the data
of experience are always in space (the
outer sense), and in time (the inner, or
intuitive).
- The empiricists had declared that the actual
stuff (sense data) of experiences, such as
colors, sounds, etc., pour into human minds
through the sense-organs;
- Hence, nothing is in the intellect which was
not previously in the senses, except (as Leibniz
had said in his criticism of Locke) the
intellect itself.
The subject-matter of knowledge comes from
knowledge but this is only a fraction of knowledge.
Whence then comes the relatedness of knowledge in
space and time since we have no sense-organs for
these aspects of experience?
- Space and time must therefore be innate in
us, a contribution of our minds to our
perceptual data. They are conditions of
experience and not abstractions from it.
- Kant thought that geometry was the science
of space, and arithmetic the science of
time.
- He declared the impossibility of making
absolutely universal and necessary judgments
about the facts of experience. Some facts, as in
mathematical calculations, are independent of
our experience. They are prior to experience and
experience must be judged by such facts and
facts by experience.
CRITIQUE OF PURE
REASON
Kant observes that there are three kinds of
judgment:
- Analytical judgment, which is
achieved when the predicate of a proposition is
known through the analysis of the subject;
- Synthetic a posteriori, which is
achieved when the predicate is attributed to the
subject by force of experience;
- Synthetic a priori, or that which
enjoys universality and necessity.
Synthetic a priori judgments alone are the
foundation of perfect science. Kant undertakes the
study of these judgments in his Critique of Pure
Reason, which is divided as follows.
Transcendental
Aesthetic
Kant studies the a prior forms, which organize
sensible perceptions (or pure intuitions). These
forms are two: space and time. The sciences which
are founded on space and time are geometry and
arithmetic; they enjoy universality and necessity
by virtue of the subjective forms of space and
time.
Transcendental
Analytic
The forms of space and time have given us a
manifold series of pure intuitions. The human
spirit, which tends to the unification of
knowledge, feels impelled to progress to a higher
degree of understanding, which is centered in the
intellect. The intellect is endowed with twelve a
priori forms, called categories. In virtue
of these, the intellect collects and makes stable
many data of experience under the concept of
substance; it connects phenomena by means of the
concept of cause and effect. Substance and
causality are categories of the intellect. These
categories give us an understanding of the physical
world. Hence physics is endowed with universality
and necessity, not because its laws represent a
universal and necessary aspect of reality but
because the intellect gives the phenomena such
universality and necessity by virtue of its
categories.
Transcendental
Dialectic
The unification of phenomena through the
categories is not absolute. The spirit, which tends
to the absolute unity of all knowledge, reorganizes
the data of the intellect in a higher degree. The a
priori forms of this reorganization are called
ideas; reason is the faculty directing this
operation.
The reorganizing ideas are three:
- The idea of the external world -- this idea
is a form under which all exterior phenomena are
collected;
- The idea of soul -- this is a form under
which all interior phenomena are collected;
- The idea of God -- this is the idea which
collects the totality of phenomena.
For Kant these three ideas of reason are beyond
true knowledge; for true knowledge can only be
drawn from a phenomenon perceived according to the
categories of the intellect. God, the soul, and the
world belong to the noumenal world, in which there
is no such thing as phenomenal perception.
CRITIQUE OF PRACTICAL
REASON
In the Critique of Practical Reason, Kant
studies the problem of what makes a human action
morally good. Kant resolves the question by means
of the categorical imperative, which imposes
itself with the force of duty, without any regard
for the good or evil that may result from it. The
categorical imperative enjoys universality and
necessity; hence it comes from the subject, that
is, from the will itself. Thus it is an a priori
form of will.
Kant observes that the a priori forms of the
intellect are empty and need to be applied to some
empirical element in order to become effective. On
the other hand, the categorical imperative is
already determined in itself and itself determines
the empirical element (the human action to be
performed); it is the will which make the human act
good, not vice versa. Thus the will belongs to the
world of the noumena, of the absolute and
unconditioned. Kant teaches that the categorical
imperatives can only be explained on the basis of
three postulates: namely, liberty, the immortality
of the soul, and God. Thus Kant believed not only
that he had reconstructed metaphysics, but also
that he had reestablished it on a more solid
basis.
CRITIQUE OF
JUDGMENT
In the Critique of Judgment, Kant studies
the judgments of sentiment. He believed that the
two aspects of reality (phenomenal and noumenal)
are synthesized, through the judgment of sentiment,
into a single act of perception of the
thinking-ego.
Judgments of sentiment arise:
- From the finality of nature -- the
ego, reflecting upon the mechanical succession
of nature, notes a harmonious ordering of the
different parts to the same end and judges this
to be the result of the purposeful action of a
rational mind;
- From an aesthetic vision -- here the
ego considers the elements of nature as the
means by which its spiritual faculties can be
satisfied.
In both judgments, the ego is not subordinate to
the phenomena; on the contrary, the phenomena are
supposed to be subordinate to the ego. Thus the ego
is conscious of itself as a person, as a reality of
the absolute and unconditioned world.
CONCLUSION
Kant does not deny the existence of God, the
soul and the world; but he holds that we cannot
have perfect knowledge of them. And he holds this
because of the prejudice that man can have perfect
knowledge only of the world of phenomena.
Confusion in thought reigned after Kant -- the
philosopher of reformed thinking. Kant was
variously regarded. Some thought him to be a
skeptic, others held he was the savior of religious
faith. Some successors to Kant, such as Schiller,
Fichte, Schelling, and Hegel, made philosophy the
time honored mental discipline.
Kantian epistemology needed to be developed. The
Kantian dualism of the intelligible and phenomenal
worlds, freedom and mechanism, form and matter,
knowledge and faith, practical and theoretical
reason, presented many problems. The Kantian
critical foundation became the challenge left to
Kant's followers: Fichte, Schelling, and Hegel.
But some critics of Kant appear. Herder opposes
the Kantian dualism of mental faculties and urges
the unity of the soul-life. Thought and will, he
maintained, spring from a common ground. The
history of mankind is a process of evolution
directed toward the ideal of humanity. Our rational
capacity should therefore be educated and fashioned
into reason, our more refined senses into art, our
impulses into genuine freedom and beauty, our
motives into the love of humanity.
Jacobi declared that the Critique
logically ends in subjective idealism, and rejected
its conclusions. Jacob Fries seeks to combine the
teachings of Kant and Jacobi.
In The Radical
Academy
Elsewhere On the
Internet
The positive contributions
of Immanuel Kant to
the Perennial Philosophy
None. But despite errors, absurdities, and
contradictions, Kant's philosophy has exercised a
tremendous influence upon human thinking for over a
century and a half. It exhibits the roots of those
weaknesses we have come to regard as characteristic
of what is loosely called "the German philosophy."
It refuses to face reality (witness the wholly
subjectivistic character of knowledge); it unduly
stresses the ego (witness the inner and autonomous
character of knowledge and morality); it proclaims
the perfectibility of the will, upon which the
followers of Kant were soon to harp most strongly
-- and from Nietzsche to Hitler we are to hear of
"the will to power," the will which makes "the
superman" and "the master race." Many historians of
philosophy consider Immanuel Kant to be the father
of modern Idealism.
See the essay: The
Origins of Intellectual Insanity: What is Wrong
with Kant's Philosophy?
To The
Successors of Kant
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