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“Behavior evolves through natural selection, just as anatomy does. Hence if sex is enjoyable, natural selection must have been responsible for that outcome.”

“A thought, even a possibility, can shatter and transform us.”

“There is a kind of sleep that steals upon us sometimes , which, while it holds the body prisoner, does not free the mind from a sense of things about it, and enable it to ramble as it pleases. So far as an overpowering heaviness, a prostration of strength, and an utter inability to control our thoughts or power of motion can be called sleep, this is it; and yet we have a consciousness of all that is going on about us, and even if we dream, words which are really spoken, or sounds which really exist at the moment, accommodate themselves with surprising readiness to our visions, until reality and imagination become so strangely blended that it is afterwards almost a matter of impossibility to separate the two.”

“Don't aim at success — the more you aim at it and make it a target, the more you are going to miss it. For success, like happiness, cannot be pursued; it must ensue, and it only does so as the unintended side-effect of one's personal dedication to a cause greater than oneself or as the by-product of one's surrender to a person other than oneself. Happiness must happen, and the same holds for success: you have to let it happen by not caring about it. I want you to listen to what your conscience commands you to do and go on to carry it out to the best of your knowledge. Then you will live to see that in the long run — in the long run, I say — success will follow you precisely because you had forgotten to think of it.”

“No limits but the sky.”