“Picasso had a saying - 'good artists copy, great artists steal' - and we have always been shameless about stealing great ideas.”

This is a favorite phrase of Jobs, but he is (mis)quoting Pablo Picasso. "Lesser artists borrow; great artists steal" is similarly attributed to Igor Stravinsky, but both sayings may well originate in T. S. Eliot's dictum http://en.wikisource.org/wiki/The_Sacred_Wood/Philip_Massinger: "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."
Misattributed

Compare: "Immature poets imitate; mature poets steal." T. S. Eliot, in Philip Massinger, in The Sacred Wood (1920)
Disputed

Compare: "Immature poets imitate; mature poets steal." T. S. Eliot, in Philip Massinger, in The Sacred Wood (1920)
Disputed
Variant: Good artists copy, great artists steal.

Empire magazine interview, 1994.

Source: Holes

UTI interview (2004)
Context: The law about what is stealing is very clear. Stealing is taking something away from someone so they cannot use it. There’s no way that making a copy of something is stealing under that definition.
If you make a copy of something, you’ll be prosecuted for copyright infringement or something similar — not larceny (the legal term for stealing). Stealing, like piracy and intellectual property, is another one of those terms cooked up to make us think of intellectual works the same way we think of physical items. But the two are very different.
You can’t just punish people because they took away a “potential sale”. Earthquakes take away potential sales, as do libraries and rental stores and negative reviews. Competitors also take away potential sales.

Source: The Autobiography of Alice B. Toklas

Source: As quoted in Conversations with George Moore (1929) by Geraint Goodwin, p. 123

L’Orfèvre, Lorenzaccio (1834).