וְאִם־בָּ֤א לִרְא֨וֹת ׀ שָׁ֤וְא יְדַבֵּ֗ר לִבּ֗וֹ יִקְבָּץ־אָ֥וֶן ל֑וֹ יֵצֵ֖א לַח֣וּץ יְדַבֵּֽר׃
And if one come to see me, he speaketh falsehood; His heart gathereth iniquity to itself; when he goeth abroad, he speaketh of it.
Read kabbalistic (mystical) interpretation of Psalms 41:7: and classical mystical sources.