"Our normal human tendencies are distraction and dissipation. We begin one task, then get seduced by some other option, and lose our focus. We drift away from what is difficult and we know to be true, to what is comfortable and socially condoned."

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Progress is the exploration of our own error. Evolution is a consolidation of what have always begun as errors. And errors are of two kinds: errors that turn out to be true and errors that turn out to be false (which are most of them). But they both have the same character of being an imaginative speculation. I say all this because I want very much to talk about the human side of discovery and progress, and it seems to me terribly important to say this in an age in which most non-scientists are feeling a kind of loss of nerve.

— Jacob Bronowski