Sin is anything not in the expressed will of God.
We are programed to sin, or in other words we are programed to be outside the expressed will of God, and have been given the oppertunity to come back via a state of Grace through the attoning sacerfice of Christ. what does that mean? God gave us Choice. In order to have choice we must have viable unhendered ablity to choose and be met with the true consenquence of said choices otherwise the choices we make are moot. (Maybe mute too
) Which is the reason bad things happen to 'good people.' (that may not have directly made a bad choice but it does not mean some one did not sin against them) In short Sin is how 'free will' is accomplished. For if we are without sin their is only God's expressed will. If their is only the expressed will of God 'we' have no choice to do other than what God has told us, He wants done.
So through sin God has given us choice (even before their was knoweledge of sin their has always been the ablity to choose, as repersented by the tree of knoweledge in the Garden, and man's access to it.) that choice by default forces us outside God's expressed will. It is up to us to choose to return.
(as outlined in the story of the prodigal son.)
Side discussion: Free will is also the reason their can not be undenyable proof of God. Because undenyable proof ends our ablity to choose.
We are programed to sin, or in other words we are programed to be outside the expressed will of God, and have been given the oppertunity to come back via a state of Grace through the attoning sacerfice of Christ. what does that mean? God gave us Choice. In order to have choice we must have viable unhendered ablity to choose and be met with the true consenquence of said choices otherwise the choices we make are moot. (Maybe mute too

So through sin God has given us choice (even before their was knoweledge of sin their has always been the ablity to choose, as repersented by the tree of knoweledge in the Garden, and man's access to it.) that choice by default forces us outside God's expressed will. It is up to us to choose to return.
(as outlined in the story of the prodigal son.)
Side discussion: Free will is also the reason their can not be undenyable proof of God. Because undenyable proof ends our ablity to choose.