The Institutes, Book 7
Greed, a Leprosy of the Soul
Such people are seen to be lepers in spirit and heart, after the likeness of Gehazi. Desiring the uncertain riches of this world, he was covered with the taint of foul leprosy, and through it he has left us a clear example: every soul defiled with the stain of greed is covered with the spiritual leprosy of sin, and is counted unclean before God under a perpetual curse.