Life must be lived as play.

We must be willing to fail and to appreciate the truth that often 'Life is not a problem to be solved, but a mystery to be lived.'

Sometimes - history needs a push.

Be thankful that you have a life, and forsake your vain and presumptuous desire for a second one.

The desire to fly is an idea handed down to us by our ancestors who... looked enviously on the birds soaring freely through space... on the infinite highway of the air

The highest manifestation of strength is to keep ourselves calm and on our own feet.

To live is to choose. But to choose well, you must know who you are and what you stand for, where you want to go and why you want to get there.

I am an American; free born and free bred, where I acknowledge no man as my superior, except for his own worth, or as my inferior, except for his own demerit.

Your children are not your children. They are the sons and daughters of Life's longing for itself.

We can allow satellites, planets, suns, universe, nay whole systems of universes, to be governed by laws, but the smallest insect, we wish to be created at once by special act.

Science is the most reliable guide for civilization, for life, for success in the world. Searching a guide other than the science is meaning carelessness, ignorance and heresy.

A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing.

History has shown there are no invincible armies.

What would life be if we had no courage to attempt anything?

Life does not need to mutilate itself in order to be pure.

I'm never going to be disabled. I'm sick of being so healthy.

Humility is really important because it keeps you fresh and new.

Early in life I had to choose between honest arrogance and hypocritical humility. I chose the former and have seen no reason to change.

Quick sensitivity is inseperable from a ready understanding.

Your purpose in life is to find your purpose and give your whole heart and soul to it.

In the end, it's not the years in your life that count. It's the life in your years.