Physicians had gone to their graves calling Pasteur a liar, a fool, or worseโwithout examining evidence which their โcommon senseโ told them was impossible.
Robert A. HeinleinThe universe never did make sense; I suspect it was built on government contract.
Robert A. HeinleinThere was one field in which man was unsurpassed; he showed unlimited ingenuity in devising bigger and more efficient ways to kill off, enslave, harass, and in all ways make an unbearable nuisance of himself to himself.
Robert A. HeinleinBut does Man have any 'right' to spread through the universe? Man is what he is, a wild animal with the will to survive, and (so far) the ability, against all competition. Unless one accepts that, anything one says about morals, war, politics, you name it, is nonsense. Correct morals arise from knowing what man is, not what do-gooders and well-meaning old Aunt Nellies would like him to be. The Universe will let us know - later - whether or not Man has any "right" to expand through it.
Robert A. Heinlein