Ephesians 2:10
For we are his workmanship, created in Christ Jesus for good works, which God prepared beforehand, that we should walk in them.
Observe the words he uses. He here alludes to the regeneration, which is in reality a second creation. We have been brought from non-existence into being. As to what we were before, that is, the old man, we are dead. What we are now become, before, we were not. Truly then is this work a creation, yea, and more noble than the first; for from that one, we have our being; but from this last, we have, over and above, our well being.
“For good works, which God afore prepared that we should walk in them.”
Not merely that we should begin, but that we should walk in them, for we need a virtue which shall last throughout, and be extended on to our dying day. If we had to travel a road leading to a royal city, and then when we had passed over the greater part of it, were to flag and sit down near the very close, it were of no use to us. This is the hope of our calling; for “for good works” he says. Otherwise it would profit us nothing.– St. John Chrysostom, Homily IV on the Epistle of St. Paul to the Ephesians