Every man is to be respected as an absolute end in himself; and it is a crime against the dignity that belongs to him as a human being, to use him as a mere means for some external purpose.

Art is purposiveness without purpose.

Genius is the ability to independently arrive at and understand concepts that would normally have to be taught by another person.

But a lie is a lie, and in itself intrinsically evil, whether it be told with good or bad intents.

The instruction of children should aim gradually to combine knowing and doing. Among all sciences mathematics seems to be the only one of a kind to satisfy this aim most completely.

In all judgements by which we describe anything as beautiful, we allow no one to be of another opinion.

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 in which the human spirit enters the world and the way in which he goes out of it, I dare not deny the truth of many such narratives.