[Protagoras]

I don't know what he said and I don't know what passage from the bible you say he disagrees with.

I would add an aside however, I have seen lots of people put their own interpretations on what they say bible says on any number of subjects.

In studying the bible myself, I have run across countless passages that turn out not to mean anything like what I originally thought they meant.

[Coyoteman]

I don't know what he [Heinlein] said and I don't know what passage from the bible you say he disagrees with.

Heinlein was adamantly opposed to slavery. Check Time Enough for Love (1973).