All rational knowledge is either material, and concerns some objects, or formal, and is occupied only with the form of understanding and reason itsel… - Immanuel Kant

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All rational knowledge is either material, and concerns some objects, or formal, and is occupied only with the form of understanding and reason itself and with the universal rules of thinking, without regard to distinctions among objects.

formal philosophy is called logic. Material philosophy, however, which has to do with definite object objects and the laws to which they are subject, is divided into two parts. This is because these laws are either laws of nature or laws of freedom. The science of the former is called physics, and that of the latter ethics. The former is also called theory of nature and the latter theory of morals.

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About Immanuel Kant

Immanuel Kant (22 April 1724 – 12 February 1804), born Emanuel Kant, was a German philosopher.

Biography information from Wikiquote

Also Known As

Alternative Names: Kant Emanuel Kant

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Additional quotes by Immanuel Kant

"Enlightenment is man's release from his self incurred tutelage.
Tutelage is man's inability to make use of his understanding without direction from another.
Self-incurred is this tutelage when its cause lies not in lack of reason but in lack of resolution and courage to use it without direction from another.
" Have courage to use your own reason" that's the motto of enlightenment ."

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Perhaps a revolution can overthrow autocratic despotism and profiteering or power-grabbing oppression, but it can never truly reform a manner of thinking; instead, new prejudices, just like the old ones they replace, will serve as a leash for the great unthinking mass

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