Imagination will often carry us to worlds that never were. But without it we go nowhere.

One glance at a book and you hear the voice of another person, perhaps someone dead for 1,000 years. To read is to voyage through time.

We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.

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

If we go far enough back, any two people on earth have a common ancestor.

In exchange for freedom of inquiry, scientists are obliged to explain their work.

We are star stuff which has taken its destiny into its own hands.

If it can be destroyed by the truth, it deserves to be destroyed by the truth.