I can myself conceive of nothing else than the experienced.

Where everything is bad it must be good to know the worst.

Adam knew Eve his wife and she conceived. It is a pity that this is still the only knowledge of their wives at which some men seem to arrive.

It is good to know what a man is, and also what the world takes him for. But you do not understand him until you have learnt how he understands himself.

Up to a certain point every man is what he thinks he is.

The hunter for aphorisms on human nature has to fish in muddy water, and he is even condemned to find much of his own mind.

My external sensations are no less private to my self than are my thoughts or my feelings. In either case my experience falls within my own circle, a circle closed on the outside... the whole world for each is peculiar and private to that soul.