"But on the other hand we must remember, as the point that was made, is that the church is very loose on moral evils, because although they try to accuse people like me, who believe in empiricism and the Enlightenment, of somehow what they call moral relativism, as if it’s some appalling sin, where what it actually means is thought, they for example thought that slavery was perfectly fine, absolutely okay, and then they didn’t. And what is the point of the Catholic church if it says ‘oh, well we couldn’t know better because nobody else did,’ then what are you for?"
January 1, 1970
https://en.wikiquote.org/wiki/Slavery