He has no worse enemy than himself.

He cannot be strict in judging, who does not wish others to be strict judges of himself.

The evil implanted in man by nature spreads so imperceptibly, when the habit of wrong-doing is unchecked, that he himself can set no limit to his shamelessness.

It is besides necessary that whoever is brave should be a man of great soul.

Six mistakes mankind keeps making century after century: Believing that personal gain is made by crushing others; Worrying about things that cannot be changed or corrected; Insisting that a thing is impossible because we cannot accomplish it; Refusing to set aside trivial preferences; Neglecting development and refinement of the mind; Attempting to compel others to believe and live as we do.

It is like taking the sun out of the world, to bereave human life of friendship.

It is pleasant to recall past troubles.