When the Sun shrinks to a dull red dwarf, it will not be dying. It will just be starting to live and everything that has gone before will merely be a prelude to its real history.

Any path to knowledge is a path to God-or Reality, whichever word one prefers to use

Science is the only religion of mankind.

I will not be afraid because I understand ... And understanding is happiness.

As three laws were good enough for Newton, I have modestly decided to stop there.

The best proof of intelligent life in space is that it hasn't come here.

There's a passage about 'rivers of molten rock that wound their way... until they cooled and lay like twisted dragon-shapes vomited from the tormented earth.' That's a perfect description: how did Tolkien know, a quarter century before anyone ever saw a picture of Io? Talk about Nature imitating Art.