Ah, the conscience, one can always rely on his conscience...
Jer 17:9 "The heart is deceitful above all things, And desperately wicked; Who can know it?
Where does Paul say heart in that passage? Paul very clearly says CONSCIENCE,you know that little thing that tells you done something wrong even when one is an UNBELIEVER. You know that thing that people pay a lot of money in therapy to deal with?