On artistic borrowing...

Les Murray:

"Artistic borrowing... leaves the lender no poorer, and draws attention to his riches, which can only be depleted by neglect and his loss of confidence in them; these cause them to be lost. Borrowing is an act of respect which may restore his respect for his goods, and help to preserve them. And he is at all times free to draw on them himself."

Hughes, R. (1993). A Culture of Complaint. New York, NY: Oxford University Press. p. 93