“According to the promise of life which is in Christ Jesus.” In these words there is a foreshadowing of the Epistle’s content, which occasioned their inclusion in this inscription. The aim of the Epistle is to inspire Saint Timothy to courageous preaching of the faith and to the preservation of the faithful in the faith, in the face of dangers and deaths.
In such circumstances, what could inspire more than the promise of life, which death itself does not take away, but opens as a door? The Apostle indicates this at the very beginning. I am an Apostle, he says, according to the promise of life, that is, according to the work of the promise of life.
“The Master, God, with the Son’s unity of will, appointed me Apostle, that I might preach to men the promised eternal life” (blessed Theodoret). He was appointed Apostle to proclaim this life to all people. Of course, he did so with the assurance that it is first of all the undoubted possession of those who proclaim it, and therefore also of Saint Timothy, as one of them.
The thought of this could not fail to serve him as consolation and encouragement. Thus Saint Paul “at the very beginning of the Epistle encourages his soul. Do not remind me, he says, of the afflictions here. They procure for us eternal life, where there is none of this, where there is no sickness, sorrow, or sighing” (Saint Chrysostom).
Not only dangers are our lot, but death everywhere stands ready. Yet “we die in order to live forever” (blessed Theophylact). Although this has only been promised, the promise is so certain that it is as though we already possessed it. Nevertheless, it still lies ahead. “If it is a promise, then do not seek it here; for hope that is seen is not hope (cf. Rom 8:24)” (Saint Chrysostom).
“Which is in Christ Jesus.” “The life which is in Christ Jesus, that is, with Christ, because He gives it to us and contains it. Bodily life consists in food and drink, but spiritual life is contained in Christ Jesus. He is everything for us” (blessed Theophylact).
This life is received here, develops here, and grows strong here. What is promised is its manifestation in all its brightness and glory. Therefore κατ' επαγγελιαν, “according to the promise,” may also be translated: according to the proclamation, according to the work of proclaiming the life which is in Christ Jesus. This is the life received immediately through faith and acceptance of the sacrament, and eternal life forms its inseparable part.