“Sin is a falling away from what is good, whereas iniquity is transgression of the law. The first is a rejection of good as a general principle, the second is a particular violation of a law. The sinner therefore is someone who goes against nature, and it is the nature of human beings to live rationally. Sin is therefore something which must be regarded as absurd.”
(St. Theophylact of Ohrid on 1 John)