John Chrysostom
What constitutes impurity? It is transgression, malice, greed, and deception. “Wash yourselves,” declares the prophet, “cleanse yourselves; put away your wicked deeds from my presence” (Isaiah 1:16). “Create in me a pure heart, O God” (Ps. 50:12). “Depart, depart, go out from there; do not touch what is unclean” (Is. 52:11). The purifications of the Old Testament served as symbols of genuine cleansing.