It is not enough to understand, or to see clearly. The future will be shaped in the arena of human activity, by those willing to commit their minds and their bodies to the task.

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.

What is objectionable, what is dangerous, about extremists is not that they are extreme, but that they are intolerant. The evil is not what they say about their cause, but what they say about their opponents.

Tragedy is a tool for the living to gain wisdom, not a guide by which to live.

But we can perhaps remember, if only for a time, that those who live with us are our brothers, that they share with us the same short moment of life; that they seek, as do we, nothing but the chance to live out their lives in purpose and in happiness, winning what satisfaction and fulfillment they can.

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

The future does not belong to those who are content with today, apathetic toward common problems and their fellow man alike, timid and fearful in the face of bold projects and new ideas. Rather, it will belong to those who can blend passion, reason and courage in a personal commitment to the great enterprises and ideals of American society.