John 16:8

"He, when He is come, will reprove the world." That is, "they shall not do these things unpunished if He come. For indeed, the things that have been already done, are sufficient to stop their mouths; but when these things are also done by Him, when doctrines are more perfect and miracles greater, much more shall they be condemned when they see such things done in My Name, which make the proof of the Resurrection more certain. For now they are able to say, 'this is the carpenter's son, whose father and mother we know'; but when they see the bands of death loosed, wickedness cast out, natural lameness straightened, devils expelled, abundant supply of the Spirit, and all this effected by My being called on, what will they say? The Father hath borne witness of Me, and the Spirit will bear witness also." Yet He bare witness at the beginning. Yea, and shall also do it now. ...

(Tr. xcv. 1) But how is it that Christ did not reprove the world? Is it because Christ spoke among the Jews only, whereas the Holy Spirit, poured into His disciples throughout the whole world, reproved not one nation only, but the world? But who would dare to say that the Holy Ghost reproved the world by Christ's disciples, and that Christ did not, when the Apostle exclaims, Do ye seek a proof of Christ speaking in Me? (2 Cor. 13:3. Vulg.) Those then whom the Holy Ghost reproves, Christ reproves also. He shall reprove the world, means, He shall pour love into your hearts, insomuch, that fear being cast out, ye shall be free to reprove.

The Lord, when promising that He would send the Holy Spirit, said, "When He is come, He will reprove the world of sin, and of righteousness, and of judgment." What does it mean? Is it that the Lord Jesus Christ did not reprove the world of sin, when He said, "If I had not come and spoken unto them, they had not had sin; but now they have no cloak for their sin"? And that no one may take it to his head to say that this applied properly to the Jews, and not to the world, did He not say in another place, "If ye were of the world, the world would love his own"? Did He not reprove it of righteousness, when He said, "O righteous Father, the world hath not known Thee"? And did He not reprove it of judgment when He declared that He would say to those on the left hand, "Depart ye into everlasting fire, prepared for the devil and his angels"? And many other passages are to be found in the holy evangel, where Christ reproveth the world of these things. Why is it, then, He attributeth this to the Holy Spirit, as if it were His proper prerogative? Is it that, because Christ spake only among the nation of the Jews, He does not appear to have reproved the world, inasmuch as one may be understood to be reproved who actually hears the reprover; while the Holy Spirit, who was in His disciples when scattered throughout the whole world, is to be understood as having reproved not one nation, but the world? For mark what He said to them when about to ascend into heaven: "It is not for you to know the times or the moments, which the Father hath put in His own power. But ye shall receive the power of the Holy Spirit, that cometh upon you: and ye shall be witnesses unto me in Jerusalem, and in all Judea, and in Samaria, and unto the uttermost part of the earth." Surely this is to reprove the world. But would any one venture to say that the Holy Spirit reproveth the world through the disciples of Christ, and that Christ Himself doth not, when the apostle exclaims, "Would ye receive a proof of Him that speaketh in me, namely Christ?" And so those, surely, whom the Holy Spirit reproveth, Christ reproveth likewise. But in my opinion, because there was to be shed abroad in their hearts by the Holy Spirit that love which casteth out the fear, that might have hindered them from venturing to reprove the world which bristled with persecutions, therefore it was that He said, "He shall reprove the world:" as if He would have said, He shall shed abroad love in your hearts, and, having your fear thereby expelled, ye shall have freedom to reprove. We have frequently said, however, that the operations of the Trinity are inseparable; but the Persons needed to be set forth one by one, that not only without separating Them, but also without confounding Them together, we may have a right understanding both of Their Unity and Trinity.