To keep on learning. Always.

 

“I found the definite action; but the bullfight was so far from simple and I liked it so much that it was much too complicated for my then equipment for writing to deal with and, aside from four very short sketches, I was not able to write anything about it for five years – and I wish I would have waited ten. However, if I had waited long enough I probably never would have written anything at all since there is a tendency when you really begin to learn something about a thing not to want to write about it but rather to keep on learning about it always and at no time, unless you are very egotistical, which, of course, accounts for many books, will you be able to say: now I know all about this and will write about it.”
Death in the Afternoon, E. Hemingway