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“Sometimes I think, how lucky we are to live in this time, the first moment in human history when we are, in fact visiting other worlds and engaging in a deep reconnaissance of the cosmos. But if we had been born in a much earlier age, no matter how great our dedication, we couldn't have understood what the stars and planets are. We would not have known that there were other suns and other worlds. This is one of the great secrets wrested from nature, through a million years of patient observation and courageous thinking.”
“Whatsoever is contrary to nature is contrary to reason, and whatsoever is contrary to reason is absurd.”
“Doing what has never been done before is intellectually seductive, whether or not we deem it practical.”
“It’s okay not to know all the answers. It’s better to admit our ignorance than to believe answers that might be wrong. Pretending to know everything closes the door to finding out what is really there.”
“Science works on the frontier between knowledge and ignorance. We are not afraid to admit what we don’t know. There’s no shame in that. The only shame is to pretend that we have all the answers.”