Lennie said, “I thought you was mad at me, George.”
“No,” said George. “No, Lennie, I ain’t mad. I never been mad, and I ain’ now. That’s a thing I want ya to know.”

– John Steinbeck

Of Mice and Men, Chapter 5. George is trying to wipe all thoughts of sorrow and loneliness from Lennie’s mind just before he shoots his friend. He wants his final thoughts to be about their friendship and the dream of the farm and rabbits.