When I listen to the public debates about climate change, I am impressed by the enormous gaps in our knowledge, the sparseness of our observations and the superficiality of our theories.

You ask: what is the meaning or purpose of life? I can only answer with another question: do you think we are wise enough to read God's mind?

The greatest unsolved mysteries are the mysteries of our existence as conscious beings in a small corner of a vast universe.

If you want to have a program for moving out into the universe, you have to think in centuries not in decades.

A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible. There are no prima donnas in engineering.

Technology must be guided and driven by ethics if it is to do more than provide new toys for the rich.

The idea that global warming is the most important problem facing the world is total nonsense and is doing a lot of harm.

Unfortunately the global warming hysteria, as I see it, is driven by politics more than by science.

In the end it is how you fight, as much as why you fight, that makes your cause good or bad.

So long as you have courage and a sense of humor, it is never too late to start life afresh.

Technology is a gift of God. After the gift of life it is perhaps the greatest of God's gifts. It is the mother of civilizations, of arts and of sciences.

It's like we are underground, in a cemetery....the sky is the earth...We are hibernating, sleeping all the time and we don't know it. We are dreaming that there is plenty of oxygen.

A mother's love for her child is like nothing else in the world. It knows no law, no pity, it dares all things and crushes down remorselessly all that stands in its path.

Do not live in the future, only the present is real

The secular state is the guarantee of religious pluralism. This apparent paradox, again, is the simplest and most elegant of political truths.

Abnormal is so common, it's practically normal.

Remember that all models are wrong; the practical question is how wrong do they have to be to not be useful.

We must take our friends as they are.

People who dream small dreams continue to live as small people.

The only thing I know is that I know nothing

The highest aim of the aesthetic being is to find the Divine through beauty; the highest Art is that which by an inspired use of significant and interpretative form unseals the door of the spirit.