because the person who gives him a greeting shares in his evil deeds.

If anyone comes to you and does not bring this teaching, do not receive him into your house and do not give him any greeting,

(Now this is love: that we walk according to his commandments.) This is the commandment, just as you have heard from the beginning; thus you should walk in it.

From the elder, to an elect lady and her children, whom I love in truth (and not I alone, but also all those who know the truth),