It is a thousand times harder to make simple things than complicated ones — Михаи́л Кала́шников (Wikipedia entry for Mikhail Kalashnikov)
Good artists copy, great artists steal
One of the surest tests [of the superiority or inferiority of a poet] is the way in which a poet borrows. Immature poets imitate; mature poets steal; bad poets deface what they take, and good poets make it into something better, or at least something different. The good poet welds his theft into a whole of feeling which is unique, utterly different than that from which it is torn; the bad poet...