Ghost stories are always listened to and well received in private, but pitilessly disavowed in public. For my own part, ignorant as I am of the way i….

Thoughts without content are empty, intuitions without concepts are blind..

Metaphysics is a dark ocean without shores or lighthouse, strewn with many a philosophic wreck..

Give a man everything he wants and at that moment everything is not everything.

Criticism alone can sever the root of materialism, fatalism, atheism, free-thinking, fanaticism, and superstition, which can be injurious universally….

Thrift is care and scruple in the spending of one's means. It is not a virtue and it requires neither skill nor talent..

Nature does nothing in vain, and in the use of means to her goals she is not prodigal. Her giving to man reason and the freedom of the will which dep….

Act in such a way that you treat humanity, whether in your own person or in the person of any other, never merely as a means to an end, but always at….

Procrastination is hardly more evil than grasping impatience..

Time is not an empirical concept. For neither co-existence nor succession would be perceived by us, if the representation of time did not exist as a ….

There is something splendid about innocence; but what is bad about it, in turn, is that it cannot protect itself very well and is easily seduced..

I freely admit that the remembrance of David Hume was the very thing that many years ago first interrupted my dogmatic slumber and gave a completely ….

Freedom is independence of the compulsory will of another, and in so far as it tends to exist with the freedom of all according to a universal law, i….

Ours is an age of criticism, to which everything must be subjected..

All thought must, directly or indirectly, by way of certain characters, relate ultimately to intuitions, and therefore, with us, to sensibility, beca….

Often war is waged only in order to show valor; thus an inner dignity is ascribed to war itself, and even some philosophers have praised it as an enn….

Out of the crooked timber of humanity, no straight thing was ever made..

Live your life as though your every act were to become a universal law..

I ought never to act except in such a way that I could also will that my maxim should become a universal law..

. . . as to moral feeling, this supposed special sense, the appeal to it is indeed superficial when those who cannot think believe that feeling will ….

I had therefore to remove knowledge, in order to make room for belief..