“You’re supposed to do one thing. If you do more than that, people get confused.”
—Margaret Atwood

“I made every mistake in the book. You should never do two things. You should hammer one nail all your life, and I didn’t do that; I hammered on a lot of nails like a xylophone.”
—Brion Gysin

“I really haven’t found a single subject I’m not somewhat interested in.”
—Jeremy Gleick, a UCLA student who devoted an hour every morning to learning something new

See also: Don’t discard.