Inspired by the awesome series of books "The Dark Tower" by Stephen King, is a reference to the creed of the gunslingers with Roland Deschain, the main character of the books, as center of the set.
This creed, for those who haven't read the King's magnus opus (I highly recommend it) and as a spoiler, reads:
I don't aim with my hand;
He who aims with his hand has forgotten the face of his father.
I aim with my eye.
I don't shoot with my hand;
He who shoots with his hand has forgotten the face of his father.
I shoot with my mind.
I don't kill with my gun;
He who kills with his gun has forgotten the face of his father.
I kill with my heart