John 9:4

"I must work the works of Him that sent Me." That is, "I must manifest Myself, and do the things which may show that I do the same things with the Father"; not things "similar," but, "the same," an expression which marks greater unvaryingness, and which is used of those who do not differ ever so little. Who then after this will face Him, when he seeth that He hath the same power with the Father? For not only did He form or open eyes, but gave also the gift of sight, which is a proof that He also breathed in the soul. Since if that did not work, the eye, though perfected, could never see anything; so that He gave both the energy which is from the soul, and gave the member also possessing all things, both arteries and nerves and veins, and all things of which our body is composed.

"I must work while it is day." What mean these words? To what conclusion do they lead? To an important one. For what He saith is of this kind. "While it is day, while men may believe on Me, while this life lasteth, I must work." "The night cometh," that is, futurity, "when no man can work." He said not, "when I cannot work," but, "when no man can work": that is, when there is no longer faith, nor labors, nor repentance. For to show that He calleth faith, a "work," when they say unto Him, "What shall we do, that we might work the works of God?" He replieth, "This is the work of God, that ye believe on Him whom He hath sent." How then can no man work this work in the future world? Because there faith is not, but all, willingly, or unwillingly, will submit. For lest any one should say that He acted as He did from desire of honor, He showeth that He did all to spare them who had power to believe "here" only, but who could no longer "there" gain any good thing.

(Tr. xliv. 4) By His saying, Who sent Me, He gives all the glory to Him from Whom He is. The Father hath a Son Who is from Him, but hath none from whom He Himself is.

"I must work the works of Him that sent me, while it is day." Recall to thy mind the way in which He gives universal glory to Him of whom He is: for that One has the Son who is of Him; He Himself has no One of whom He is. But wherefore, Lord, saidst Thou, "While it is day"? Hearken why He did so. "The night cometh when no man can work." Not even Thou, Lord. Will that night have such power that not even Thou, whose work the night is, wilt be able to work therein?

For when the Son declared that He worked the works of the Father, He proved that His and His Father's works were the same: which are to heal the sick, to strengthen the weak, and enlighten man.