R. Daneel Olivaw said this quote

“ The robot said, “I have been trying, friend Julius, to understand some remarks Elijah made to me earlier. Perhaps I am beginning to, for it suddenly seems to me that the destruction of what should not be, that is, the destruction of what you people call evil, is less just and desirable than the conversion of this evil into what you call good.” He hesitated, then, almost as though he were surprised at his own words, he said, “Go, and sin no more! ”