Penicillin was indeed the product of accidental discovery, but the discovery was made, and the knowledge developed, because certain scientists had definite goals in mind. "Chance," Pastuer wrote, "favors only the prepared mind." The mind must be prepared not only by scientific training and technological know-how, but also by the awareness of social needs.
There's a certain kind of conversation you have from time to time at parties in New York about a new book. The word "banal" sometimes rears its by-now banal head; you say "underedited," I say "derivative." The conversation goes around and around various literary criticisms, and by the time it moves on one thing is clear: No one read the book; we just read the reviews.
Life is like an overlong drama through which we sit being nagged by the vague memories of having read the reviews.
The artist doesn't have time to listen to the critics. The ones who want to be writers read the reviews, the ones who want to write don't have the time to read reviews.