Albert Barnes Commentary 2 John 1:6

"And this is love, that we should walk after his commandments. This is the commandment, even as ye heard from the beginning, that ye should walk in it." — 2 John 1:6 (ASV)

And this is love, that we walk after his commandments (2 John 1:6). This is the proper expression or evidence of love to God. See the notes on John 14:15 and John 14:21.

This is the commandment (2 John 1:6). That is, this is his great and peculiar commandment; the one by which his disciples are to be peculiarly characterized, and by which they are to be distinguished in the world. See the notes on John 13:34.