John Calvin on Ephesians 1:12

12. That we should be to the praise of his glory. Here again he mentions the final cause of salvation; for we must eventually become illustrations of the glory of God, if we are nothing but vessels of his mercy. The word glory, by way of eminence, (κατ ᾿ ἐξοχὴν) denotes, in a peculiar manner, that which shines in the goodness of God; for there is nothing that is more peculiarly his own, or in which he desires more to be glorified, than goodness.

Ephesians 1:13-14

13. In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also, after that ye believed, ye were sealed with that Holy Spirit of promise,

13. In quo vos etiam, audito sermone veritatis, Evangelio salutis vestrae; in quo etiam, postquam credidistis, obsignati estis Spiritu promissionis sancto,

14. Which is the earnest of our inheritance, until the redemption of the purchased possession, unto the praise of his glory.

14. Qui est arrhabo haereditatis nostrae, in redemptionem acquisitae possessionis, in laudem gloriae ejus.