You do not really understand something unless you can explain it to your grandmother.

I don't need to know everything, I just need to know where to find it, when I need it

Paper is to write things down that we need to remember. Our brains are used to think.

The true measure of a man is the degree to which he has managed to subjugate his ego.

With fame I become more and more stupid, which of course is a very common phenomenon.

The world as we see it is only the world as we see it. Others may see it differently.

No one does anything right in life, until they realize that they are making a mistake

For me a simple message, to think and act with courage, independence and imagination.

Inner freedom is an infrequent gift of nature and a worthy object for the individual.

The same thinking and actions that created our problems cannot be used to solve them.

A table, a chair, a bowl of fruit and a violin; what else does a man need to be happy.

It was the experience of mystery - even if mixed with fear - that engendered religion.

The only thing we can be certain of in this life is that we can be certain of nothing.

We cannot get to where we dream of being tomorrow unless we change our thinking today.

Time and space are not conditions of existence, time and space is a model for thinking

To be free means to be independent, not to be influenced by what others think and say.

Logic can take you from point A to point B. Imagination can take you wherever you want

Enjoying the joys of others and suffering with them-these are the best guides for man.

The world is not threatened by evil people, but by those who allow evil to take place.

The Revolution introduced me to art, and in turn, art introduced me to the Revolution!

The importance of a problem should not be judged by the number of pages devoted to it.

A table, a chair, a bowl of fruit and a violin; what else does a man need to be happy?

No matter how hard you try to teach your cat general relativity, you're going to fail.

I enjoy reading blogs, but am not interested in having my spurious thoughts out there.

I think that only daring speculation can lead us further and not accumulation of facts.

From the viewpoint of a Jesuit priest I am, of course, and have always been an atheist.

A great thought begins by seeing something differently, with a shift of the mind's eye.

Energy cannot be created or destroyed, it can only be changed from one form to another.

I take it to be true that pure thought can grasp the real, as the ancients had dreamed.

People are like bicycles. They can keep their balance only as long as they keep moving.

Although I tried to be universal in thought, I am European by instinct and inclination.

I've seen children's eyes light up when I tell them about black holes and the Big Bang.

This is one of the great social functions of science - to free people from superstition

It is the supreme art of the teacher to awaken joy in creative expression and knowledge.

It is my conviction that killing under the cloak of war is nothing but an act of murder.

I have repeatedly said that in my opinion the idea of a personal God is a childlike one.

Past is dead Future is uncertain; Present is all you have, So eat, drink and live merry.

Small is the number of them that see with their own eyes and feel with their own hearts.

Feeling and longing are the motive forces behind all human endeavor and human creations.

If people would only talk about what they understood, Earth would be a very quiet place.

If you do the same thing over and over again you cannot ever expect a different outcome.

Despite my being an old gypsy there is a tendency to respectability inherent in old age.

Time has no independent existence apart from the order of events by which we measure it.

The word God is for me nothing more than the expression and product of human weaknesses.

Capitalism has brought with it progress, not merely in production but also in knowledge.

The bigotry of the nonbeliever is for me nearly as funny as the bigotry of the believer.

We can't solve problems by using the same kind of thinking we used when we created them.

Art makes us human, music makes us human, and I deeply feel that science makes us human.

I believe we owe our young an education that captures the exhilarating drama of science.

I'd say many features of string theory don't mesh with what we observe in everyday life.

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