All the more reason not to trust the person... if the fact that someone is a "born-aginner" even has to be mentioned, then there must be
something less-than-honest/honorable that said supposedly-
clean-living person has to hide --- "methinks he doth
protest too much"!
I have seldom if ever had any more
luck with the honesty/integrity/consistency/reliability/kindness of someone about whom I was solemnly assured that, "I'm/he's/she's a Christian, so you can trust me/him/her"... in fact, if anything, these stuck-up
Bible-thunpers often seem to be even BIGGER a**h**es than their "non-believer" counterparts! They
think that "God will forgive them" for anything they do, and so they make little
true effort to keep their word or otherwise treat their fellow humans with even basic decency.