Seeing you have purified your souls in your obedience to the truth through the Spirit in sincere brotherly affection, love one another from the heart fervently:
What is your part? Just believing. You know, God's done all the work. He didn't leave anything as important as the work to someone as weak as you. You'd mess it up. So God did all the work and all that is left for you to do is to believe the work of God.