Quotes about instinct

"You remind me of another of those old fellows called Bradley. He defined philosophy as the finding of bad reason for what one believes by instinct..."

[...] men are not astonish'd at the operations of their own reason, at the same time, that they admire the instinct of animals, and find a difficulty in explaining it, merely because it cannot be reduc'd to the very same principles. [...] reason is nothing but a wonderful and unintelligible instinct in our souls[.]

"I don't believe in the god of the Christians who gave his son in order to save mankind. That's a myth. But why should it have arisen if it didn't express some deep-seated intuition in men? I don't know what I believe, because it's instinctive, and how can you describe an instinct with words? I have an instinct that the power that rules us, human beings, animals and things, is a dark and cruel power and that everything has to be paid for, a power that demands an eye for an eye and a tooth for a tooth, and that though we may writhe and squirm we have to submit, for the power is ourselves."

"By itself," he said, "pain is not always enough. There are occasions when a human being will stand out against pain, even to the point of death. But for everyone there is something unendurable — something that cannot be contemplated. Courage and cowardice are not involved. If you are falling from a height it is not cowardly to clutch at a rope. If you have come up from deep water it is not cowardly to fill your lungs with air. It is merely an instinct which cannot be destroyed. It is the same with the rats. For you, they are unendurable. They are a form of pressure that you cannot withstand, even if you wished to. You will do what is required of you."