And if he come to see me, he speaketh vanity: his heart gathereth iniquity to itself; when he goeth abroad, he telleth it.
And if he come to see me. "He" - i:e., the wicked enemy.
He speaketh vanity - i:e., he hypocritically professes love.
His heart gathereth iniquity to itself. Or, as Hengstenberg, '(As for) his heart (all the time that his lips are hypocritically professing to me love), he is gathering mischief (i:e., matter for malicious calumnies against me) to himself.'
When he goeth abroad, he telleth it - when he has gone out from me, he spreads abroad the mischievous calumnies which he has concocted at heart while with me. Compare the exit of the traitor Judas from the holy supper, the divinely appointed pledge of love, to perpetrate the foul treachery against his Lord (John 13:30), "He then having received the sop, went immediately out."