We can judge the heart of a man by his treatment of animals.

[Aristotle formal logic thus far (1787)] has not been able to advance a single step, and hence is to all appearances closed and completed.

I learned to honor human beings, and I would find myself far more useless than the common laborer if I did not believe that this consideration could impart to all others a value establishing the rights of humanity.

Art is purposiveness without purpose.

THERE ARE TWO THINGS that don't have to mean anything, one is music and the other is laughter.

Always recognize that human individuals are ends, and do not use them as means to your end.

All thought must, directly or indirectly, by way of certain characters, relate ultimately to intuitions, and therefore, with us, to sensibility, because in no other way can an object be given to us.