"Adams, irreverent to the end, declared that, if it could ever be demonstrated conclusively that no future state existed (no afterlife), his advice to every man, woman, and child was to “take opium.”
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Selected Quotes of Richard Feynman
"The first principle is that you must not fool yourself - and you are the easiest to fool.
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"Physics is like sex. Sure, it may give some practical results, but that's not why we do it.
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"I think it's much more interesting to live not knowing than to have answers which might be wrong.
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"If you think you understand quantum mechanics you don't understand quantum mechanics
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