Mark 2:10

(Vict. Ant. e Cat. in Marc.) And because it is easier to say than to do, there was still manifestly something to say in opposition, for the work was not yet manifested; wherefore He subjoins, But that ye may know, &c. as if He said, Since ye doubt my word, I will bring on a work which will confirm what was unseen. But He says in a marked manner, On earth to forgive sins, that He might show that He has joined the power of the divinity to the human nature by an inseparable union, because although He was made man, yet He remained the Word of God; and although by an economy He conversed on the earth with men, nevertheless He was not prevented from working miracles and from giving remission of sins. For His human nature did not in any thing take away from these things which essentially belonged to His Divinity, nor the Divinity hinder the Word of God from becoming on earth, according to the flesh, the Son of Man without change and in truth.

(ubi sup.) A carnal sign therefore is given, that the spiritual sign may be proved, although it belongs to the same power to do away with the distempers of both soul and body; whence it follows: And immediately he arose, took up the bed, and went forth before them all.

(non occ.) Further, He first healed by the remission of sins that which He had come to seek, that is, a soul, so that when they faithlessly doubted, then He might bring forward a work before them, and in this way His word might be confirmed by the work, and a hidden sign be proved by an open one, that is, the health of the soul by the healing of the body.

But though their thoughts were laid bare, still they remain insensible, refusing to believe that He who knew their hearts could forgive sins, wherefore the Lord proves to them the cure of the soul by that of the body, showing the invisible by the visible, that which is more difficult by that which is easier, although they did not look upon it as such. For the Pharisees thought it more difficult to heal the body, as being more open to view; but the soul more easy to cure, because the cure is invisible; so that they reasoned thus, Lo, He does not now cure the body, but heals the unseen soul; if He had had more power, He would at once have cured the body, and not have fled for refuge to the unseen world. The Saviour, therefore, showing that He can do both, says, Which is the easier? as if He said, I indeed by the healing of the body, which is in reality more easy, but appears to you more difficult, will prove to you the health of the soul, which is really more difficult.