Godliness was made to look very unappealing. He presented it as the truth. He didn't ask Adam to knowingly believe a lie . He told Adam and Eve that they would benefit and gain great knowledge and wisdom by eating of the fruit. In essence, he told them that it would open their eyes to the truth .
Iniquity is made to look like a good thing.
As we see the prophets coming to the nation Israel, the presentation of godliness remains unchanged. For example, in Isaiah's presentation of Christ, he makes clear that godliness in the form of flesh will not very appealing. In the earthy ministry of Christ we again see a marked contrast between godliness and iniquity, but not the contrast you might expect. Notice two distinct groups of people that Christ deals with in ministry. And he saith unto them, Follow me, and I will make you fishers of men.