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This IMPERFECT PARALLEL SYMMETRY allows us to look at a very familiar passage based on the repeating words, by grace you have been saved through faith. The emphasis is:
1) The TRANSPOSITION of C′ to a position before B′ places considerably more emphasis on that element. For we are emphatically saved by grace through our faith, a gift from God.
2) The LAST/LAST elements, D and D′, inform us of our new position, for we are seated with Christ in heavenly places.
3) The CONCLUDING SUMMARY confirms what B′ and D′ states, that we are created to walk with Christ, not because of something we did, but because of that one thing that Jesus did.