Today's reading is a difficult one, but the point Paul emphasizes several times is that in Christ we have redemption. By this he means not only that our sins are forgiven, but also that we become God's children by adoption and get a new start in that way as well. While we already have this new life as children of God, we also look ahead to an even better future, what Paul calls "a plan for the fullness of time, to gather up all things in [Christ], things in heaven and things on earth..." When things have run their course we will be part of the redemption of the whole world. We see that future now in the love we know in Jesus and we hope for God's plan to be fulfilled.
Knowing that future guides us in our actions. God calls us to fit in not with the twisted world around us now, but with the redeemed future we hope for. God calls us to love other people as Chris has loved us, to live like the blessed future is here already. In hope, we follow Christ each day.