Gregory the Great

(ubi sup.) The woman kisses the feet which she has wiped. This also we fully do when we ardently love those whom we maintain by our bounty. By the feet also may be understood the mystery itself of the Incarnation. We then kiss the feet of the Redeemer when we love with our whole heart the mystery of the Incarnation. We anoint the feet with ointment, when we proclaim the power of His humanity with the good tidings of holy eloquence. But this also the Pharisee sees and grudges, for when the Jewish people perceives that the Gentiles preach God, it consumes away by its own malice. But the Pharisee is thus repulsed, that as it were through Him that false people might be made manifest, for in truth that unbelieving people never offered to the Lord even those things which were without them; but the Gentiles being converted, poured forth not only their substance but their blood. Hence He says to the Pharisee, Thou gavest me no water for my feet, but she hath washed my feet with her tears; for water is without us, the moisture of tears is within us. That unfaithful people also gave no kiss to the Lord, for it was unwilling to embrace Him from love whom it obeyed from fear, (for the kiss is the sign of love,) but the Gentiles being called cease not to kiss the feet of their Redeemer, for they ever breathe in His love.