Mark 2:3

After this, they introduce the paralytic, of whom Matthew and Luke speak; wherefore there follows: And they came unto him bearing one sick of the palsy, who was carried by four. Finding the door blocked up by the crowd, they could not by any means enter that way. Those who carried him, however, hoping that he could merit the grace of being healed, raising the bed with their burden, and uncovering the roof, lay him with his bed before the face of the Saviour. And this is that which is added: And when they could not lay him before him, &c.

Or else, because there are four virtues, by which a man is through an assured heart exalted so that he merits safety; which virtues some call prudence, fortitude, temperance, and justice. Again, they desire to bring the palsied man to Christ, but they are impeded on every side by the crowd which is between them, because often the soul desires to be renewed by the medicine of Divine grace, but through the sluggishness of the grovelling body is held back by the hindrance of old custom. Oftentimes amidst the very sweetnesses of secret prayer, and, as it may be called, the pleasant converse with God, a crowd of thoughts, cutting off the clear vision of the mind, shuts out Christ from its sight. Let us not then remain in the lowest ground, where the crowds are bustling, but aim at the roof of the house, that is, the sublimity of the Holy Scripture, and meditate on the law of the Lord.

Again, the palsy is a type of the torpor, in which man lies slothful in the softness of the flesh, though desiring health.

This is not however the paralytic, whose cure is related by John, (John 5) for he had no man with him, this one had four; he is cured in the pool of the sheep market, but this one in a house. It is the same man, however, whose cure is related by Matthew (Matt. 9) and Mark. But mystically, Christ is still in Capernaum, in the house of consolation.