[Mr. Silverback]

Therefore, if you base your responses and/or arguments upon the Bible and the authority of God to these sorts of people it is to them as though you've just said...."Because Superman said so in his Superman comic book."

Bingo!

Anybody think Tolkien got Lewis to be a Christian without using any secular information?

[Lindykim]

CS Lewis called this sort persuasive argumentation....."coming in the back door." When I go into pagan/agnostic/secular humanist groups, which are most generally designated as dgs for "free-thinkers" my arguments are always couched in secular terms.