In three words I can sum up everything I've learned about life: it goes on.

Life is tough, but it's tougher when you're stupid.

Work harder on yourself than you do on your job.

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

During your life, never stop dreaming. No one can take away your dreams

The past is the best prophet of the future.

Imagination and fiction make up more than three quarters of our real life.

Consistency is contrary to nature, contrary to life. The only completely consistent people are the dead.

Life is an ongoing process of choosing between safety (out of fear and need for defense) and risk (for the sake of progress and growth). Make the growth choice a dozen times a day.

Life must be lived as play.

We are called to be architects of the future, not its victims.

Life is not measured by the number of breaths we take, but by the moments that take our breath away.

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

Old age, especially an honoured old age, has so great authority, that this is of more value than all the pleasures of youth.

Joy is what happens to us when we allow ourselves to recognize how good things really are.

Almost all our desires, when examined, contain something too shameful to reveal.

On stage, I make love to 25,000 different people, then I go home alone.

To cherish what remains of the Earth and to foster its renewal is our only legitimate hope of survival.

Losing your way on a journey is unfortunate. But, losing your reason for the journey is a fate more cruel.

I am not young enough to know everything.

Science is the outcome of being prepared to live without certainty and therefore a mark of maturity. It embraces doubt and loose ends.