Punishment is not prevention. History offers cold comfort to those who think grievance and despair can be subdued by force.

If you never quit, youll never fail.

You're happiest while you're making the greatest contribution.

We can master change not though force or fear, but only though the free work of an understanding mind, though an openness to new knowledge and fresh outlooks, which can only strengthen the most fragile and most powerful of human gifts: the gift of reason.

The future is not a gift: it is an achievement. Every generation helps make its own future. This is the essential challenge of the present

When you teach a man to hate and fear his brother, when you teach that he is a lesser man because of his color or his beliefs or the policies he pursues, when you teach that those who differ from you threaten your freedom or your job or your family, then you also learn to confront others not as fellow citizens but as enemies...

The enlargement of liberty for individual human beings must be the supreme goal and abiding practice of any western society.