Theophylact of Ohrid

Upon the Lord's entrance into Capernaum, many, having heard that He was in a house, gathered in hope of convenient access to Him. At this, the faith of the men who brought the paralytic was so great that they broke through the roof of the house and lowered him down. Therefore the Lord also grants him healing, seeing the faith of those who brought him or the faith of the paralytic himself. For he himself would not have allowed them to take him if he did not believe that he would be healed. …

Commentary on Mark ↗

Augustine of Hippo

But Matthew writes this miracle as if it were done in the city of the Lord, whilst Mark places it in Capernaum, which would be more difficult of solution, if Matthew had also named Nazareth. But seeing that Galilee itself might be called the city of the Lord, who can doubt but that the Lord did these things in His own city, since He did them in Capernaum, a city of Galilee; particularly as Capernaum was of such importance in Galilee as to be called its metropolis? …

Catena Aurea by Aquinas ↗

Bede

And again he entered Capernaum, etc. The Savior of all, God, with saving step, surveys all things. And sometimes in deserts, now in the city, now by the sea, he ministers to the crowds the gifts of heavenly doctrine and virtues. Sometimes he alone prays on the mount, sometimes he assists those laboring at sea so that they may not perish. Everywhere, he imparts the gifts of salvation, so that he demonstrates all ranks and conditions pertain to his grace. …

On the Gospel of Mark ↗