He learned it from his Buddhist/Hindu mentors. They don’t have everything right, but they are quite square on the existence of a moral universe. So yes, “REALLY.”
No not karma which is a key tenant of various eastern religions.
It’s the INSTANT part. There is no timeline for karmic restitution. Could get it after you come back as a. Brahma bull or perhaps a cockroach
John Lennon was a royal @$$hat