In Pastorals only here and 1Ti 3:16 (note). See Introd. VI. Justification is conceived as taking place before the outpouring of the Spirit.
By his grace (τῇ ἐκείνου χάριτι)
By the grace of Jesus Christ. See Act 15:11; 2Co 8:9; 2Co 13:14; Rom 5:6; Gal 1:6.
We should be made heirs (κληρονόμοι γενηθῶμεν)
Κληρονόμος heir only here in Pastorals. A favorite idea of Paul. See Rom 4:13; Rom 8:17; Gal 3:29. Heirship of eternal life is the result of justification. So, clearly, Romans 5. It is attested and confirmed by the Holy Spirit. 2Co 5:5; Eph 1:14.
According to the hope of eternal life (κατ' ἐλπίδα ζωῆς αἰωνίου)
Const. of eternal life with heirs, and rend. heirs of eternal life according to hope. Comp. Rom 4:18; Rom 5:2; Rom 8:24; Gal 5:5; Col 1:5, Col 1:27; Tit 1:2; 1Pe 1:3; 1Jo 3:2, 1Jo 3:3.