We should seek the greatest value of our action.

A model is a good model if first it interprets a wide range of observations in terms of a simple and elegant model, and second if the model makes definite predictions that can be tested, and possibly falsified, by observation.

If you lined up all the cars in the world end to end, someone would try to pass them.

Only time - whatever that may be - will tell.

Science makes God unnecessary.

I think [contacting an alien civilization] would be a disaster. The extraterrestrials would probably be far in advance of us. The history of advanced races meeting more primitive people on this planet is not very happy, and they were the same species. I think we should keep our heads low.

Doing a job RIGHT the first time gets the job done. Doing the job WRONG fourteen times gives you job security.