12. ἀσθενοῦσαν refers rather to the present condition than the permanent character of the conscience, and intimates the hope that the weakness will pass away as the believer grows in grace.
εἰς Χριστόν. Cf. Mat 25:40; Mat 25:45. For the reason of this compare John 17 throughout, as also such passages as Rom 12:5; Eph 1:23; Eph 3:17; Eph 4:15-16; Col 2:19; and ch. 1Co 10:17, 1Co 12:27 of this Epistle, where the indwelling of Christ in the individual believer is taught.