What lies behind us and what lies before us are tiny matters compared to what lies within us.

Unless we stand for something, we shall fall for anything.

Defeat may serve as well as victory to shake the soul and let the glory out.

A house divided against itself cannot stand.

Nature does nothing uselessly.

A subtle thought that is in error may yet give rise to fruitful inquiry that can establish truths of great value.

Civilization is always in danger when those who have never learned to obey are given the right to command.