Never utter these words: 'I do not know this, therefore it is false.' One must study to know; know to understand; understand to judge.

We should not pretend to understand the world only by the intellect. The judgement of the intellect is only part of the truth.

We are the product of 4.5 billion years of fortuitous, slow biological evolution. There is no reason to think that the evolutionary process has stopped. Man is a transitional animal. He is not the climax of creation.

Somewhere, something incredible is waiting to be known.

It is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.

Science is a way of thinking much more than it is a body of knowledge.