“Great artists make the roads; good teachers and good companions can point them out. But there ain't no free rides, baby.”

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

"The Roads We Take"
Whirligigs (1910)

"The Road to Hell (Part 2)"
Song lyrics, The Road to Hell (1989)

Preface
Lacon (1820)

Source: One Flew Over the Cuckoo's Nest

Source: The Quick and the Dead (1973), Ch. 5; the statement here wrongly attributed by a character in the story to a Quaker, who are generally pacifists, is actually one usually attributed to the Puritan, Oliver Cromwell.
Context: Out here you better have a gun, and a gun in the wagon ain't good for nothin'. I believe what the old Quaker said,"Trust in the Lord, but keep your powder dry."

Song lyrics, Modern Times (2006), Someday Baby

Source: A Portrait of the Artist as a Young Man