Beware the man of a single book.

When fear is excessive it can make many a man despair.

Good can exist without evil, whereas evil cannot exist without good.

Now this relaxation of the mind from work consists on playful words or deeds. Therefore it becomes a wise and virtuous man to have recourse to such things at times.

The test of the artist does not lie in the will with which he goes to work, but in the excellence of the work he produces.

It is a sin directly against one's neighbour, since one man cannot over-abound in external riches, without another man lacking them.

The happy man in this life needs friends.