Parents fear the destruction of natural affection in their children. What is this natural principle so liable to decay? Habit is a second nature, which destroys the first. Why is not custom nature? I suspect that this nature itself is but a first custom, as custom is a second nature.

Who knows if this other half of life where we think we're awake is not another sleep a little different from the first.

It is of dangerous consequence to represent to man how near he is to the level of beasts, without showing him at the same time his greatness. It is likewise dangerous to let him see his greatness without his meanness. It is more dangerous yet to leave him ignorant of either; but very beneficial that he should be made sensible of both.

Kind words do not cost much. Yet they accomplish much.

The mind of the greatest man on earth is not so independent of circumstances as not to feel inconvenienced by the merest buzzing noise about him; it does not need the report of a cannon to disturb his thoughts. The creaking of a vane or a pully is quite enough. Do not wonder that he reasons ill just now; a fly is buzzing by his ear; it is quite enough to unfit him for giving good counsel.

If I had more time I would write a shorter letter.

Undoubtedly equality of goods is just; but, being unable to cause might to obey justice, men has made it just to obey might. Unable to strengthen justice, they have justified might--so that the just and the strong should unite, and there should be peace, which is the sovereign good.