for Christians: when does the individual 'Fall into sin'?

[True Federalist (진정한 연방 주의자)]

Option 5.

"Sin" is an inevitable consequence of the combination of free will and our lack of omniscience.  To me, what the story of Genesis 3 relates is the moment when we realize that at times we will inevitably commit evil for the best of reasons.

[True Federalist (진정한 연방 주의자)]

Sins are acts, sin is NOT a state of being.

The funniest thing about this particular Christian perspective on sin is that they have it completely wrong.  For instance take the “we hate the act of homosexuality, not the homosexual thoughts God Satan put in your head” line of thinking.  Homosexual acts are relatively meaningless, and can be performed by straight men just as well.  But homosexuality as a state of mind, that is completely different, and that is what poses the fundamental threat to their notion of family values.

FTFY, at least as far as fundamentalist thought would go.

[True Federalist (진정한 연방 주의자)]

I support the original sin view, but I'm surprised at the late ages some of you are quoting. I've seen my two year old niece break the eighth commandment

Do you think a two year old girl has the cognitive capacity to understand that taking things from someone else is 'usually' a wrong thing to do? Are you aware that to a toddler, possession means ownership. They essentially have a 'right' to anything within grabbing distance and that generally speaking under four, never mind two they difficulty distinguishing between what is 'mine' and what is 'yours' (or not theirs). The concept of 'stealing' as opposed to 'taking' does not apply to them. How on earth are they breaking any rule?

So sin requires recognition by the doer that they have done wrong?  You seem to be taking the opposite position in another thread, tho not as stridently as some others in that thread.  Altho to be fair, most people in that thread seem to be taking the position that sin occurs not when the doer recognizes they've done something wrong, but when they themselves see the doer doing something they perceive as wrong.  (To be clear, in that particular tragedy I think the parents sinned against the child, and the child sinned against the trucker, tho in neither case did they undertake their action with the intent of sinning.)

[True Federalist (진정한 연방 주의자)]

Sin is when we separate ourselves from God's love.

By that definition, we never sin for only in our pride do we imagine that we are able to make ourselves into something that God could not love.  But it is indeed true that sins are those acts that we feel make us unworthy of love because they are acts we would not want another to do unto us.