I think it's much more interesting to live not knowing than to have answers which might be wrong.

It is not how old you are, but how you are old.

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

Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.

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

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

Any place I hang my head is home.

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

Don't cry for a man who's left you - the next one may fall for your smile.

I am convinced we do not only love ourselves in others but hate ourselves in others too.

It is easier to influence strong than weak characters in life.

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

Everything existing in the universe is the fruit of chance and necessity.

The things that come to those that wait may be the things left by those that got there first.

Exceptional claims demand exceptional evidence.

A life not lived for others is not a life.

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

Everything we do is infused with the energy with which we do it. If we're frantic, life will be frantic. If we're peaceful, life will be peaceful. And so our goal in any situation becomes inner peace.

History repeats itself, first as tragedy, second as farce.

Every life has a measure of sorrow, and sometimes this is what awakens us.

I can't help thinking that there are only one or two ways of being brought into this world, but there are so many fucked-up ways of leaving it.