One can't predict the weather more than a few days in advance.

The victim should have the right to end his life, if he wants. But I think it would be a great mistake. However bad life may seem, there is always something you can do, and succeed at. While there's life, there is hope.

The life we have on Earth must have spontaneously generated itself. It must therefore be possible for life to generate spontaneously elsewhere in the universe.

All that my work has shown is that you don't have to say that the way the universe began was the personal whim of God.

One cannot really argue with a mathematical theorem.

Before we understand science, it is natural to believe that God created the universe. But now science offers a more convincing explanation.

It often happens that I have an idea, but then I try to fill in the intermediate steps and find they don't work, so I have to give it up.