ISB ~ Mark 7 v21

the heart of man:In biblical terminology, the heart is the center of the person and the source of every decision that manifests itself through deeds. Jesus thus links true defilement with the heart, where evil actions and intentions have their hidden beginning (Mt 5:28). His inventory of vices is similar to others in the NT (Rom 1:29-31; Gal 5:19-21; 1 Pet 4:3; CCC 1432, 2517-19).