I cannot often enough say, that a man is only a relative and representative nature. Each is a hint of the truth, but far enough from being that truth, which yet he quite newly and inevitably suggests to us. If I seek it in him, I shall not find it.
... the friendship of worthless people has a bad effect (because they take part, unstable as they are, in worthless pursuits, and actually become bad through each other's influence). But the friendship of the good is good, and increases in goodness because of their association. They seem even to become better men by exercising their friendship and improving each other; for the traits that they admire in each other get transferred to themselves.
A man will fight harder for his interests than for his rights. Men are moved by only two mechanisms: fear and self-interest. Victory belongs to the most persevering.
Nature does nothing in vain, and in the use of means to her goals she is not prodigal. Her giving to man reason and the freedom of the will which depends upon it is clear indication of her purpose. Man accordingly was not to be guided by instinct, not nurtured and instructed with ready-made knowledge; rather, he should bring forth everything out of his own resources.
Scholars are those who have read in books, but thinkers, men of genius, world-enlighteners, and reformers of the human race are those who have read directly in the book of the world.