The behavior of “the woman which was a sinner,” when she covered the Lord’s feet with her kisses, bathed them with her tears, wiped them with the hairs of her head, anointed them with ointment, produced an evidence that what she handled was not an empty phantom, but a really solid body, and that her repentance as a sinner deserved forgiveness according to the mind of the Creator, who is accustomed to prefer mercy to sacrifice. But even if the stimulus of her repentance proceeded from her faith, she heard her justification by faith through her repentance pronounced in the words, “Thy faith hath saved thee,” by Him who had declared by Habakkuk, “The just shall live by his faith.”
Tertullian
The Five Books Against Marcion, Book IV
Chapter XVIII