One who gives himself to bodily pleasures cannot be tireless in virtue or readily hasten toward knowledge. Therefore he has no man (Jn 5:5-15), that is, no conscious discernment. When the water is troubled, such discernment would lower him into the pool, that is, into virtue capable of receiving knowledge and healing every infirmity. This is so, provided the sick man, through negligence, does not delay and is not already seized by another infirmity that prevents his healing.
For this reason the paralytic lay in his infirmity for thirty-eight years. Whoever contemplates visible creation, yet not for the glorification of God, and does not piously lift his mind to intelligible nature, rightly remains paralyzed for this number of years. The number thirty, understood according to natural contemplation, signifies sensible nature. Considered according to spiritual division, it signifies practical virtue. The number eight, understood according to natural contemplation, signifies the intelligible nature of bodiless beings. According to contemplative vision, it signifies wise theology.
Whoever is not moved by these things toward God remains paralyzed until God the Word comes to him and teaches him. He commands briefly: "Rise, take up your bed, and walk" (Jn 5:8). That is, God the Word commands him to be master of his mind and to guard it from the love of pleasures that surrounds it. He commands him to lift the body upon the shoulders of the virtues and to go to his own house, plainly, to Heaven. For the worse should be lifted by the better upon the shoulders of spiritual labor for the sake of virtue. The better must not be dragged by the worse, through the soul's paralysis, in pursuit of pleasures.