"But no artist, I now realize, can be satisfied with art alone. There is a natural craving for recognition which cannot be gain-said."

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[M]y work, which I've done for a long time, was not pursued in order to gain the praise I now enjoy, but chiefly from a craving after knowledge, which I notice resides in me more than in most other men. And therewithal, whenever I found out anything remarkable, I have thought it my duty to put down my discovery on paper, so that all ingenious people might be informed thereof.

— Antonie van Leeuwenhoek