To say that our sinful nature can be annihilated in this life is a great heresy.
We can deliver the old man to death by the Power of the Cross of Calvary and render it powerless and withered as though dead, but we cannot annihilate it.
Whenever we are careless and unwatchful, whenever we do not stand on the death ground of Calvary, our old man will renew its activities and resume its office.
Satan is always looking for an opportunity to reactivate the old man.
And as soon as there is a loophole, the old man will recover its original position.