A.T. Robertson Commentary 1 Corinthians 8:6

"yet to us there is one God, the Father, of whom are all things, and we unto him; and one Lord, Jesus Christ, through whom are all things, and we through him." — 1 Corinthians 8:6 (ASV)

Yet to us there is one God, the Father (αλλ' ημιν εις θεος ο πατηρ). B omits αλλ' here, but the sense calls for it anyhow in this apodosis, a strong antithesis to the protasis (even if at least , κα ειπερ).

Of whom (εξ ου). As the source (εξ) of the universe (τα παντα as in Ro 11:36; Colossians 1:16f.) and also our goal is God (εις αυτον) as in Ro 11:36 where δι' αυτου is added whereas here δι' ου (through whom) and δι' αυτου (through him) point to Jesus Christ as the intermediate agent in creation as in Col 1:15-20; John 1:3f. Here Paul calls Jesus

Lord (Κυριος) and not

God (θεος), though he does apply that word to him in Ro 9:5; Titus 2:13; Colossians 2:9; Acts 20:28.