We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths.

The historian looks backward. In the end he also believes backward.

As you go through life, you've got to see the valleys as well as the peaks.

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

A woman may very well form a friendship with a man, but for this to endure, it must be assisted by a little physical antipathy.

If we couldn't laugh we would all go insane.

A man who dares to waste one hour of time has not discovered the value of life.

How wonderful it is that nobody need wait a single moment before starting to improve the world.

It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.

Is it progress if a cannibal uses a fork?

He who is in love with himself has at least this advantage - he won't encounter many rivals.

It is only because of problems that we grow mentally and spiritually.

You are not stuck where you are unless you decide to be.

Our life is frittered away by detail. Simplify, simplify.

All that is not eternal is eternally out of date.

In their innocence, very young children know themselves to be light and love. If we will allow them, they can teach us to see ourselves the same way.

Take a chance! All life is a chance. The man who goes farthest is generally the one who is willing to do and dare.

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

Life must be lived as play.

The earth is like a spaceship that didn't come with an operating manual.

Life shrinks or expands in proportion to one's courage.