You know the saying “actions speak louder than words”? When non-believers see your loving actions, done in the name of God, they will follow. It is exactly what Jesus did. He gave the world testimony of God’s incredible love and mercy, though His actions and through His words. There will always be those who doubt and slander you, like the Pharisees. Still, He assured us that, in the end, He will prevail.
Service to others is a big help in leading unbelievers to Christ. If we don’t have love, we have nothing to offer anyone.