The elect are called. The called are justified. Those who preserve justification are glorified (Rom 8:30). Seeing clearly that the Thessalonians had been led into this wondrous way of God, St. Paul thanked God in joy for them.
St. Paul could already see this from the fact that they had been called to the Gospel, for this calling is an indication of election. Yet he draws special conviction in this matter from the fact that their very calling was accompanied by extraordinary manifestations of God’s power. In this special character of their calling he sees the special character of their election. Therefore he adds the address: “brethren beloved by God.”
He brings all this to their remembrance both to comfort them in sorrows and to assure them that, by believing and by standing in the faith, they are accomplishing God’s work. They are doing what God wants from them and what He chose them for.
To what should the phrase “by God” be referred, to “brethren beloved by God” or to “your election by God”? Our interpreters do not dwell on this. In expounding the present passage, they use both expressions. Theophylact writes: “We know that you are chosen by God.” Oecumenius writes: “We know that you are chosen and beloved by God.” There is no need to burden one’s mind over this. In thought, “by God” applies equally to both. They are chosen because they are beloved, and beloved because they are chosen.
Israel was called beloved (Ps 60:5; Ps 108:6) according to election (Rom 11:28). Christians too are beloved as elect (Col 3:12). “Beloved” is more intelligible and more consoling. Perhaps St. Paul placed this term before election so as to bring election, something abstract, nearer to the heart, and thus enable it to produce its effect upon the heart.
Gracious election is the realization of God’s love toward particular persons. According to this love, He brought into action through Jesus Christ the plan of salvation for sinful mankind which had been present in Him from eternity. Then, by calling them to faith in the Gospel, He successively brings them to participation in it.
The act of election is accomplished by calling. Those who follow this calling enter the state and rank of the elect. Here St. Paul has both in mind. For later he describes both how their election drew near to them, in verse 5, and how the Thessalonians entered the rank of the elect and stand in it, in verse 6. Throughout St. Paul’s writings, Christians are called elect as persons in whom God’s eternal decree concerning salvation is fulfilled through the calling to faith.