“And if there were a God, I think it very unlikely that he would have such an uneasy vanity as to be offended by those who doubt his existence.”

One of the most powerful of all our passions is the desire to be admired and respected.

Mathematics rightly viewed possesses not only truth but supreme beauty.

One of the symptoms of an approaching nervous breakdown is the belief that one’s work is terribly important.

Patriots always talk of dying for their country but never of killing for their country.

The wise man thinks about his troubles only when there is some purpose in doing so; at other times he thinks about other things, or, if it is night, about nothing at all.

A happy life must be to a great extent a quiet life, for it is only in an atmosphere of quiet that true joy can live.

Whoever wishes to become a philosopher must learn not to be frightened by absurdities.

In all affairs, it’s a healthy thing now and then to hang a question mark on the things you have long taken for granted.

We know very little, and yet it is astonishing that we know so much, and still more astonishing that so little knowledge can give us so much power.

The secret of happiness is to face the fact that the world is horrible, horrible, horrible.

No one gossips about other people’s secret virtues.

The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.

Is there any knowledge in the world that is so certain that no reasonable man could doubt it?

Three passions, simple but overwhelmingly strong, have governed my life: the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind.

Fear is the parent of cruelty, and therefore it is no wonder if cruelty and religion have gone hand in hand.

It has been said that man is a rational animal. All my life I have been searching for evidence that could support this.

It’s hard for me to describe the joy I felt after I stood up and rode wave in for the first time after the attack. I was incredibly thankful and happy inside. The tiny bit of doubt that would sometimes tell me you’ll never surf again was gone in one wave.

When in doubt, wear red.

Tonight’s show is about doubt. Or maybe it isn’t – haven’t made my mind up yet.

Ithink Isaid’All menare Jews excepttheydon’t know it.’I doubt I expected anyone to take the statement literally. But I think it’s an understandable statement and a metaphoric way of indicating how history, sooner or later, treats all men.

How quickly a person in pain whom you can’t help becomes a reproach. And then, no doubt, a thorn.

A map says to you, ‘Read me carefully, follow me closely, doubt me not.’ It says, ‘I am the earth in the palm of your hand. Without me, you are alone and lost.

There is no longer serious doubt in my mind that human life exists from the very onset of pregnancy.

I’m not a Mensa member. I have no idea where that rumor came from. I never have been, and I doubt if I ever will be.