A virus is a piece of bad news wrapped in a protein.
An experiment not worth doing is not worth doing well.
Heredity proposes and development disposes.
I cannot give any scientist of any age better advice than this: the intensity of a conviction that a hypothesis is true has no bearing over whether it is true or not.
Science is the art of the solvable.
Scientific reasoning is a kind of dialogue between the possible and the actual, between what might be and what is in fact the case.
Scientists who think science consists of unprejudiced data-gathering without speculation are merely cows grazing on the pasture of knowledge.
Simultaneous discovery is utterly commonplace, and it was only the rarity of scientists, not the inherent improbability of the phenomenon, that made it remarkable in the past. Scientists on the same road may be expected to arrive at the same destination, often not far apart.
The alternative to thinking in evolutionary terms is not to think at all.
The bells which toll for mankind are- most of them, anyway- like the bells of Alpine cattle; they are attached to our own necks, and it must be our fault if they do not make a cheerful and harmonious sound.
The human mind treats a new idea the same way the body treats a strange protein; it rejects it.
The USA is so enormous, and so numerous are its schools, colleges and religious seminaries, many devoted to special religious beliefs ranging from the unorthodox to the dotty, that we can hardly wonder at its yielding a more bounteous harvest of gobbledygook than the rest of the world put together.
Today the world changes so quickly that in growing up we take leave not just of youth but of the world we were young in.
When asked to make the formal declaration that I did not intend to overthrow the Constitution of the United States, I was fool enough to reply that I had no such purpose, but that were I to do it by mistake I should be inexpressibly contrite.
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