3 Whilst therefore he thus thinks, and while his limbs are paralyzed to the power of good works, can we, my brethren, as it were, lift up the sick of the palsy; and, as it were, “lay open the roof” of this Scripture, and let him down before the Lord. For you observe that it is obscure. If obscure therefore, it is covered. And I behold a certain patient paralytic in mind, and I see this roof, and am convinced that Christ is concealed beneath the roof. Let me, as far as I am able, do that which was praised in those who opened the roof, and let down the sick of the palsy before Christ; that He might say unto him, “Son, be of good cheer, your sins be forgiven you.” For it was so that He made the inner man whole of his palsy, by loosing his sins, by binding fast his faith....
Source: The Enarrations, or Expositions, on the Psalms (New Advent)