Here are some excerpts from Tim Gombis' blog (8th November 2011) about what sin is. Very helpful.
"Personal idolatries and ambition drive people to sin, which often draws others into participating in the destruction and self-destruction. Others who find out about wrongdoing have their own motivations for responding rightly or wrongly, choosing either to participate in cover-up and denial or to exploit the situation to their advantage. The multiplication of these motivations and decisions results in a bewildering web of deception and staggering personal, inter-personal, and institutional destruction."
"Personal, inter-personal, and systemic dynamics of corruption are all involved."
"The brilliant horror of the cosmic power of Sin is that sin begets sin on a massive scale and pervades everything. Sin invites and provokes sin. Sin runs down social networks and multiplies exponentially, destroying lives, reputations, and institutions, without respect for reputation or past credentials of honor."
Click here for Tim Gombis entire blog post.