Apparently, the famous Picasso quote was actually uttered by T.S. Eliot. Here is a quote from one of his actual books:

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 throws it into something which has no cohesion. A good poet will usually borrow from authors remote in time, or alien in language, or diverse in interest.

Eliot, T.S., “Philip Massinger,” The Sacred Wood, New York:, 2000

Taken from:

It’s impressive how popular a quote that was never said can become…