Put off your imagination, as you put off your overcoat, when you enter the laboratory. Put it on again, as you put on your overcoat, when you leave. A fact in itself is nothing. It is valuable only for the idea attached to it, or for the proof which it furnishes. The true worth of a researcher lies in pursuing what he did not seek in his experiment as well as what he sought.
Hatred is the most clear-sighted, next to genius.
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