In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed

There is nothing enlightened about shrinking so that other people won't feel insecure around you. We are all meant to shine, as children do.

Dwell on the beauty of life. Watch the stars, and see yourself running with them

Exceptional claims demand exceptional evidence.

The scientists of today think deeply instead of clearly. One must be sane to think clearly, but one can think deeply and be quite insane.

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

I was born with an enormous need for affection, and a terrible need to give it.

For life in general, there is but one decree: youth is a blunder, manhood a struggle, old age a regret.

Mastery of the emotions is fundamental to a virtuous life.

Life is a tragedy when seen in close-up, but a comedy in long-shot.

The more sand that has escaped from the hourglass of our life, the clearer we should see through it.

Short as life is, we make it still shorter by the careless waste of time.

The happiest is the person who suffers the least pain; the most miserable who enjoys the least pleasure.

A life not lived for others is not a life.

Let silence take you to the core of life.

The pleasure of the moment begins to wither almost as soon as it blossoms; our pleasures are soon swallowed up in time's relentless torrent.

Being a hero is about the shortest-lived profession on earth.

It was my care to make my life illustrious not by words more than by deeds.

We were all at once terribly alone; and alone we must see it through.

It is not the length of life, but the depth.

Wrinkles should merely indicate where the smiles have been.