Immature poets imitate; mature poets steal.

All cases are unique and very similar to others.

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.

An original writer is not one who imitates nobody, but one whom nobody can imitate.

Originality is undetected plagiarism.

Originality is nothing but judicious plagiarism.