Is having sex before marriage a sin?
Is smoking a sin?
Is gambling a sin?
Is parking double parking and you know it a sin?
Is bullying your friend a sin?
Is bullying your friend a sin?
Is looking lustfully at woman or man a sin?
I do not know which is sin or which is not, but I believe that the moment you are born, one has sin in him or herself that I also believe he or she realizes it because the law of the Lord is inside of them the moment they are created by Him. Whether they accept Him or not, the Law of the Lord is always abide in them.
Not to say sin is good, but I'm glad that God's law make me realize that I'm a sinner and I accept it. I use to think when I'm young, I don't sin so much, I don't do bad things and always do good. But as I grew up, I come to know that each and everyday, I'm sinning whether I realize it or don't realize it. I'm glad that I know because it teaches me to seek for His Grace, to seek for His forgiveness and to understands how He works in me. He doesn't see the good things I've done and then forgives me, but before I repented, He has forgiven me. Such is His Grace that is so much that a mere human cannot contain it.
Through this sinful nature in me, I learn so much about Him. His Grace, His Love, His Forgiving heart. No matter what life or past I've gone through, i leave it up to Him and move on from the mistakes I've done and learn from it.
Without going through 1 part of sin, I wouldn't understands how He works. Probably my head knows, but now my heart knows it as well.
I hope that everyone of you don't condemn yourself in this sin, but remember that Christ has died and be sacrificed to win over our death and sin. He loves you more than anything. Question may comes, but do not lean on that question so much. It's all about having Faith in God.
May you find His Grace that covers you all the day of your life. :)