Psalms 19:12
12-14. The clearer our view of the law, the more manifest are our sins. Still for its full effect we need divine grace to show us our faults, acquit us, restrain us from the practice, and free us from the power, of sin. Thus only can our conduct be blameless, and our words and thoughts acceptable to God.
Matthew 13:26
26. But when the blade was sprung up, and brought forth fruit, then appeared the tares also—the growth in both cases running parallel, as antagonistic principles are seen to do.
Luke 8:14
2 Timothy 2:17
17. will eat—literally, "will have pasture." The consuming progress of mortification is the image. They pretend to give rich spiritual pasture to their disciples: the only pasture is that of a spiritual cancer feeding on their vitals.
canker—a "cancer" or "gangrene." Hymenaeus—(See on 1Ti 1:20). After his excommunication he seems to have been readmitted into the Church and again to have troubled it. Hebrews 12:15
15. lest any . . . fall—Greek, "lest any (namely, through sloth in running) failing," or "falling short of the grace of God . . . trouble you." The image is taken from a company of travellers, one of whom lags behind, and so never reaches the end of the long and laborious journey [CHRYSOSTOM].
root of bitterness—not merely a "bitter root," which might possibly bring forth sweet fruits; this, a root whose essence is "bitterness," never could. Paul here refers to De 29:18, "Lest there should be among you a root that beareth gall and wormwood" (compare Ac 8:23). Root of bitterness comprehends every person (compare Heb 12:16) and every principle of doctrine or practice so radically corrupt as to spread corruption all around. The only safety is in rooting out such a root of bitterness. many—rather, "the many," that is, the whole congregation. So long as it is hidden under the earth it cannot be remedied, but when it "springs up," it must be dealt with boldly. Still remember the caution (Mt 13:26-30) as to rooting out persons. No such danger can arise in rooting out bad principles.