The great difficulty in education is to get experience out of ideas.

I like to walk about among the beautiful things that adorn the world; but private wealth I should decline, or any sort of personal possessions, because they would take away my liberty.

As widowers proverbially marry again, so a man with the habit of friendship always finds new friends.

Nothing is really so poor and melancholy as art that is interested in itself and not in its subject.

Truth is a jewel which should not be painted over; but it may be set to advantage and shown in a good light.

If all art aspires to the condition of music, all the sciences aspire to the condition of mathematics.

The more rational an institution is the less it suffers by making concessions to others.