John Calvin on Ephesians 2:7

7. That in the ages to come. The final and true cause — the glory of God — is again mentioned, that the Ephesians, by making it the subject of earnest study, might be more fully assured of their salvation. He likewise adds, that it was the design of God to hallow, in all ages, the remembrance of so great goodness. This exhibits still more strongly the hateful character of those by whom the free calling of the Gentiles was attacked; for they were endeavoring instantly to crush that scheme which was destined to be remembered through all ages. But we, too, are instructed by it, that the mercy of God, who was pleased to admit our fathers into the number of his own people, deserves to be held in everlasting remembrance. The calling of the Gentiles is an astonishing work of divine goodness, which ought to be handed down by parents to children, and to their children’s children, that it may never be forgotten or unacknowledged by the sons of men.

The riches of his grace in his kindness. The love of God to us in Christ is here proved, or again declared, to have had its origin in mercy. That he might shew, says he, the exceeding riches of his grace. How? In his kindness towards us, as the tree is known by its fruit. Not only, therefore, does he declare, that the love of God was free, but likewise that God displayed in it the riches, — the extraordinary pre-eminent riches of his grace. It deserves notice, also, that the name of Christ is repeated; for no grace, no love, must be expected by us from God, except through his mediation.

Ephesians 2:8-10

8. For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:

8. Gratia enim estis salvati per fidem; idque non ex vobis: Dei donum est.

9. Not of works, lest any man should boast.

9. Non ex operibus; ne quis glorietur.

10. For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.

10. Ipsius enim opus sumus, creati in Christo Iesu ad opera bona, quae praeparavit Deus, ut in illis ambulemus.