"The best computer is a man, and it's the only one that can be mass-produced by unskilled labor." - Braun, Warner von when asked if man can be replaced by computer in spaceflight

"The earth is simply too small and fragile a basket for the human race to keep all its eggs in." - Clarke, Arthur C.

"It's a very sobering feeling to be up in space and realize that one's safety factor was determined by the lowest bidder on a government contract." - Shepherd, Alan