John the Apostle
2 John 1:6BSB·traditional attribution

And this is love, that we walk according to His commandments. This is the very commandment you have heard from the beginning, that you must walk in love.

Matthew Henry Presbyterian @wholebiblehenry

We come now more into the design and substance of the epistle; and here we have, I. The apostle's request: Now, I beseech thee, lady. Considering what it is that he entreats, the way of address is very remarkable; it is not any particular boon or bounty to himself, but common duty and observance of divine command.

Commenting on 2 John 1:5-6

John Gill Reformed Baptist @doctorgill

And this is love, that we walk after his commandments,.... By observing them as a rule of conversation, in so doing love is shown to God; and such may expect the fresh discoveries of the love of God to, them; See Gill on Jo1 5:3; this is the commandment, that as ye have heard from the beginning, ye should walk in it; that is, this...

Albert Barnes Presbyterian @notesbybarnes

Verse 6. And this is love, that we walk after his commandments. This is the proper expression or evidence of love to God. , . This is the commandment. That is, this is his great and peculiar commandment; the one by which his disciples are to be peculiarly characterised, and by which they are to be distinguished in the world. . (b) "love" (c) "after" "according to"