If there is such a thing as a great scientist … that greatness can certainly not be transferred by what is commonly called teaching. What the disciples learn are the mannerisms, tricks of the trade, ways to make a career, or perhaps, in the rarest cases, a critical view of the meaning of scientific evidence and its interpretation. A real teacher can teach through his example — this is what the ducklings get from their mothers — or, most infrequently, through the intensity and the originality of his view or vision of nature.

~ Erwin Chargaff from, https://www.brainpickings.org/2016/07/27/erwin-chargaff-heraclitean-fire-misfit/

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