For doubters, listen to them and show reasonableness of faith. If sin, ask God to show them where it will lead. C. Church attendance is not the goal. It is Jesus they need. A church full of sincere believers should be the best place to find out about him.
Individualistic faith is shallow and unsatisfying.
The covering of sins. Sins forgotten on earth, by other Christians. No sin is so great God cannot accept us. Some here are living proof. Perhaps you are still outside.