As christians we must strive to live sin free lives, is this possible? I believe for some, especially mature believers, it is. The fact is we will continually face some form of temptation, great or small, for the rest of our lives. It is up to us to resist that temptation.
Blessed is the man who endures
temptation; for when he has been approved he will recieve the crown of life which the Lord has promised to those who love Him. (James 1:12)
No
temptation has overtaken you except such as is common to man; but God is faithful, who will not allow you to be
tempted beyond what you are able, but with the
temptation will also make the way of escape that you may be able to bear it. (1 Corinthians 10:13)
However I'm not convinced about unintentional sin. Its not the greatest comparison to make, but if a man commits a crime in the heat of passion, in other words it was not premeditated he wouldn't be able to stand in front of the judge and say "Oh it was an unintentional act of madness that I didn't have time to think about" and then expect to get away with it. I believe the same can be said about our sin. We can't stand before God and say "Oh I didn't intend to do it it just happened."
We are responsible for every sin
we commit.
