First of all: Só leigheas has written a poem. He has not started a debate about sin in itself. He has expressed himself about himself and that in a probably good form for him too. This forum does not allow discussions about what is the best or worst religion or if it is better to be without God! On the other hand the term 'moral' and how our morals work; are of help or is hurting us (because we have internalized very strict views on what we can allow ourselves or have too loose morals that don't stop us in time) are interesting because it has something to do with our depressions. From that point of view we can discuss our depressions.

The word 'sin' is a technical term inside at least three religions, Jewish faith, Christendom and Islam. In these religions sin means to offend God. Of course one is in one's full right to say that one don't believe in God. More and more people do that, but one cannot deny the meaning of the word 'sin' inside the frames of these religions. But to say in a forum where depression is the topic, as you did; «the idea of "sin" is a man created idiom to control others ...» is to represent one side of the «belive/believe not» debate. We all have to respect each other as human beings either we have this or that faith, are agnostics or atheists. We are here to help each other with our depressions!

Dr. Clayton E. Tucker-Ladd, a clinical Psychologist who died in 2010 made a selfhelp book online where looking upon one's moral was part of the problem-solving on how to get control over one's depression.

I don't want to hijack Só leigheas' thread, - only want to say that the way our moral is formed might be connected to how we suffer in our depressions. May be we could make a new thread for that?

Chapter 3 in the link to what is still online of Dr. Tucker-Ladd's selfhelp book is the one chapter who puts moral in perspective of self help:

Psychological Self-Help - new - Table of Contents

I wish good for everyone who reads this, whatever belief or nonbelief they might have!