A war with Pakistan would be an utter disaster.

He that struggles with us strengthens our nerves, and sharpens our skill. Our antagonist is our helper.

I never did anything worth doing by accident, nor did any of my inventions come by accident; they came by work.

'No comment' is a splendid expression. I am using it again and again.

Retain the vision for space exploration. If we turn our backs on the vision again, we're going to have to live in a secondary position in human space flight for the rest of the century.