We assume not sinning equals perfection. So if we accept that premise, we immediately lose heart in trying to figure out how to stop sinning because after all, perfection is for Jesus only.
Jesus is our model; perfection is for us too; God didn't make us to be
imperfect after all, to be sinners. This life is a
journey that He's put humankind on,
to perfection, a journey that we cannot make successfully except to the extent that we're
partnered with Him on it. And so our first and main decision is whether or not we really want this partnership, this union with the Father, the Son, and the Holy Spirit. And this "wanting", this wisdom, is progressive, we grow in our faith in, hope in, and love for God as we struggle against attraction to anything less than Him, to created things, of the flesh.
Adam essentially denied and dismissed God, going his own way, thinking he knew better than Him. We're here to learn the absolute fallacy of that choice. We're here to learn the whys and hows of turning fully back to God, until we love Him with our whole heart, soul, mind and strength and our neighbor as ourselves. With that kind of love, that only God can accomplish in us, sin would be totally excluded. It's a journey, and God is endlessly kind and patient at helping us arrive. We must strive, but the same pride that drove Adam to disobey continues to stir disobedience in ourselves, to forget our need for Him. And sometimes we must learn the lesson all over again. And hopefully learn it better this time.