Old age takes from the man of intellect no qualities save those that are useless to wisdom.

Virtue by calculation is the virtue of vice.

What is true by lamplight is not always true by sunlight.

Thoughts there are, that need no embodying, no form, no expression. It is enough to hint at them vaguely; a word, and they are heard and seen.

Science confounds everything; it gives to the flowers an animal appetite, and takes away from even the plants their chastity.

If fortune wishes to make a man estimable, she gives him virtues; if she wishes to make him esteemed, she gives him success.

Our ideals, like pictures, are made from lights and shadows.