When justice burns within us like a flaming fire, when love evokes willing sacrifice from us, when, to the last full measure of selfless devotion, we demonstrate our belief in the ultimate triumph of truth and righteousness, then Your goodness enters our lives; then You live within our hearts, and we through righteousness behold Your presence.
The passage draws together in my mind the interrelatedness of our action (justice, love, willing sacrifice, selfless devotion, demonstrable belief) and the nearness of God (entering our lives, living in our hearts, in a presence we behold). For me, it gives a bit of reality to the usually trite claim of "God living in my heart". When we live out the character of God in justice, love, and peace... it is then that we see God's presence in us.
The tangible enfleshment of the nature of the Divine in the life of the Human draws out redemption in such a way that just might be understood as atonement.