"Who then is free? the wise man who is lord over himself; Whom neither poverty nor death, nor chains alarm; strong to withstand his passions and despise honors, and who is completely finished and rounded off in himself."

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I have been trying to point out that in our lives chance may have an astonishing influence and, if I may offer advice to the young laboratory worker, it would be this-never neglect an extraordinary appearance or happening. It may be-usually is, in fact-a false alarm that leads to nothing, but may on the other hand be the clue provided by fate to lead you to some important advance.

— Alexander Fleming