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“No scientist or student of science, need ever read an original work of the past. As a general rule, he does not think of doing so. Rutherford was one of the greatest experimental physicists, but no nuclear scientist today would study his researches of fifty years ago. Their substance has all been infused into the common agreement, the textbooks, the contemporary papers, the living present.”

“science has now been for a long time - and to an ever-increasing extent - a collective enterprise. Actually, new results are always, in fact, the work of specific individuals; but, save perhaps for rare exceptions, the value of any result depends on such a complex set of interrelations with past discoveries and possible future researches that even the mind of the inventor cannot embrace the whole.”

“You should prepare to follow the program for 90 days. Why? Because behavioral research indicates that it takes 90 days to prepare for change, build a new behavior, become confident in the face of high-risk triggers, and move past the likelihood of relapse. Brain research also suggests that it takes a few months of practicing a new behavior to create permanent change.”