The Scofield Bible Commentary, by Cyrus Ingerson Scofield, [1917], at sacred-texts.com
2 John Chapter 1
that we love one another
Law (of Christ), Summary:
The new "law of Christ" is the divine love, as wrought into the renewed heart by the Holy Spirit (Rom 5:5); (Heb 10:16) and outflowing in the energy of the Spirit, unforced and spontaneous, toward the objects of the divine love; (Co2 5:14-20); (Th1 2:7); (Th1 2:8). It is, therefore, " the law of liberty"; (Jam 1:25); (Jam 2:12) in contrast with the external law of Moses. Moses' law demands love, (Lev 19:18); (Deu 6:5); (Luk 10:27) Christ's law is love; (Rom 5:5); (Jo1 4:7); (Jo1 4:19); (Jo1 4:20) and so takes the place of the external law by fulfilling it; (Rom 13:10); (Gal 5:14). It is the "law written in the heart" under the New Covenant.
(See Scofield) - (Heb 8:8).
world
Greek, "kosmos", means "mankind".
(See Scofield) - (Mat 4:8).
transgresseth
Sin
(See Scofield) - (Rom 3:23).