Thucydides

Self-control is the chief element in self-respect and self-respect is the chief element in courage.

For we both alike know that into the discussion of human affairs the question of justice enters only where the pressure of necessity is equal, and that the powerful exact when they can, and the weak grant what they must.

The ability to understand a question from all sides meant one was totally unfit for action. Fanatical enthusiasm was the mark of the real man.

We secure our friends not by accepting favors but by doing them.

The secret of Happiness is Freedom, and the secret of Freedom, Courage.

The bravest are surely those who have the clearest vision of what is before them, glory and danger alike, and yet notwithstanding, go out to meet it.

The sufferings that fate inflicts on us should be borne with patience, what enemies inflict with manly courage.

A nation that draws too broad a difference between its scholars and its warriors will have its thinking done by cowards, and its fighting done by fools.