v. 49 — Except ye see signs and wonders, ye will not believe. The nobleman saith unto Him,
Commentary on the Gospel according to John · St Cyril of Alexandria
A mind yet hard dwelleth in them who arc deceived, but mightier will be the more wonder-working power of Him That calleth them unto faith. Wherefore the Saviour says that they need wonders, that they may easily be re-instructed unto what is profitable, and acknowledge Him Who is by Nature God.
CyrJn 2.49.1
Feeble indeed unto understanding is the nobleman, for ho is a child in his petition for grace, and almost dotes without perceiving it. For by believing that Christ had power not only when present, but that He would surely avail even absent, he would have had a most worthy conception of Him. But now both thinking and acting most foolishly, he asks power befitting God, and does not think He accomplishes all things as God, nor yet that He will be superior to death, although beseeching Him to gain the advantage over him that had all but overcome; for the child was at the point of death.
CyrJn 2.49.3