I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.

I'm not an atheist. I don't think I can call myself a pantheist. The problem involved is too vast for our limited minds. We are in the position of a little child entering a huge library filled with books in many languages. The child knows someone must have written those books.

God did not create evil. Just as darkness is the absence of light, evil is the absence of God.

I urge a willingness to reserve a place in rational science for non-rational wonder.

The opinion prevailed among advanced minds that it was time that belief should be replaced increasingly by knowledge; belief that did not itself rest on knowledge was superstition, and as such had to be opposed.

The genius is in making the complex simple.

The world is an evil place to live in. Not for those who do evil, but for those who sit back and allow evil to occur.