The Christian is sure to sin. We are sure to fail because God is not done working with us until the day that we meet Jesus. Even though we fail, we have been promised that Jesus is up to something - he is making all things new - and it is precisely because of this that though the Christian might falter they can always be sure that nothing can separate them from the love of God. The return of Jesus will be the event that brings the brokenness and sinfulness of the world to an end. John promises that on the day that we meet Jesus, we will be with Jesus and made like Jesus. The promised return of Jesus builds up our assurance in three ways: it demonstrates that God loves us with a revolutionary love; that God's will is for us to be part of his forever family; and that God has a bigger vision for us than we could ever have for ourselves.