Of sin - The first thing specified of which the world would be convinced is sin. Sin, in general, is any violation of a law of God, but the particular sin of which men are here said to be convinced is that of rejecting the Lord Jesus. This is placed first, and is deemed the sin of chief magnitude, as it is the principal one of which men are guilty. This was particularly true of the Jews who had rejected him and crucified him; and it was the great crime which, when brought home to their consciences by the preaching of the apostles, overwhelmed them with confusion, and filled their hearts with remorse. It was their rejection of the Son of God that was made the great truth that was instrumental of their conversion. Acts 2:22-23, Acts 2:37; Acts 3:13-15; Acts 4:10, Acts 4:26-28; compare John 16:31-33. It is also true of other sinners. Sinners, when awakened, often feel that it has been the great crowning sin of their lives that they have rejected the tender mercy of God, and trampled on the blood of his Son; and that they have for months and years refused to submit to him, saying that they would not have him to reign over them. Thus is fulfilled what is spoken by Zechariah, Zechariah 12:10; "And they shall look upon me whom they have pierced, and mourn." Throughout the New Testament this is regarded as the sin that is pre-eminently offensive to God, and which, if unrepented of, will certainly lead to perdition, Mark 16:16; John 3:36. Hence, it is placed first in those sins of which the Spirit will convince men; and hence if we have not yet been brought to see our guilt in rejecting God's tender mercy through his Son, we are yet in the gall of bitterness and under the bond of iniquity.

Of sin - Of the sin of the Jews in not receiving me as the Messiah, though my mission was accredited by the very miracles which the prophets foretold: see Isaiah 35:3-6. This was literally fulfilled on the day of pentecost, when the Spirit was given; for multitudes of Jews were then convinced of this sin, and converted to God. See Acts 2:37.

If we take this prediction of our Lord in a more general sense, then we may consider that it is one of the grand offices of the Holy Spirit to convince of sin, to show men what sin is, to demonstrate to them that they are sinners, and to show the necessity of an atonement for sin; and in this sense the phrase, περι ἁμαρτιας, may be understood, and in this sense it is used in multitudes of places in the Septuagint, but the words, because they believe not in me, restrict the meaning particularly to the sin of the Jews in rejecting Jesus as the Messiah.

Of sin, because they believe not on me. The "sin" here primarily intended, is that of the Jews, in disbelieving, rejecting, and crucifying Christ; and which the Spirit of God, by Peter, charged upon them on the day of "Pentecost", and fully proved against them; gave such clear evidence, and wrought such strong convictions of in their minds and consciences, that being pricked to the heart, they cried out, "what shall we do?" Acts 2:23; though as this passage may be applied to the ordinary work of the Spirit of God upon the souls of men, through the ministry of the word; so it may take in convictions of sin of all sorts, as of original and actual sins, and particularly the sin of unbelief: for the Spirit of God convinces of the sinfulness and corruption of nature, the wickedness and plague of a man's heart, the sin that dwells in him; how that has overspread all the powers and faculties of his soul, rendered both him and his services unacceptable to God, loathsome in his sight, and himself hopeless and helpless, and deserving of his wrath and displeasure: he also convinces of actual sins and transgressions, showing that they are breaches of the law of God, and are committed against God himself; that they are deserving of death, even eternal death; that the wrath of God is revealed against them, and for them comes upon the children of disobedience; and that there is no atonement for them, or cleansing from them, but by the blood of Christ: he likewise convinces of the sin of unbelief, here particularly mentioned: showing the evil nature and consequences of it, to persons enjoying a Gospel revelation; that such who disbelieve the Messiah, shall die in their sins; that whoever believes not in him shall be damned; and that faith in Christ is necessary to salvation, and that without it there is none.

Of sin, because they believe not on me;

16:9 Of sin, because they believe not on me. In naming sin, the chief of all sins is singled out. All sin springs from unbelief. To destroy sin, the heart of man must be pierced with the sword of the Spirit. Hence, the aim of the Spirit on Pentecost, and always, is to destroy unbelief.

16:9 Of sin - Particularly of unbelief, which is the confluence of all sins, and binds them all down upon us.

9. Of sin, because they believe not on me-As all sin has its root in unbelief, so the most aggravated form of unbelief is the rejection of Christ. The Spirit, however, in fastening this truth upon the conscience, does not extinguish, but, on the contrary, does consummate and intensify, the sense of all other sins.

16:7-15 Christ's departure was necessary to the Comforter's coming. Sending the Spirit was to be the fruit of Christ's death, which was his going away. His bodily presence could be only in one place at one time, but his Spirit is every where, in all places, at all times, wherever two or three are gathered together in his name. See here the office of the Spirit, first to reprove, or to convince. Convincing work is the Spirit's work; he can do it effectually, and none but he. It is the method the Holy Spirit takes, first to convince, and then to comfort. The Spirit shall convince the world, of sin; not merely tell them of it. The Spirit convinces of the fact of sin; of the fault of sin; of the folly of sin; of the filth of sin, that by it we are become hateful to God; of the fountain of sin, the corrupt nature; and lastly, of the fruit of sin, that the end thereof is death. The Holy Spirit proves that all the world is guilty before God. He convinces the world of righteousness; that Jesus of Nazareth was Christ the righteous. Also, of Christ's righteousness, imparted to us for justification and salvation. He will show them where it is to be had, and how they may be accepted as righteous in God's sight. Christ's ascension proves the ransom was accepted, and the righteousness finished, through which believers were to be justified. Of judgment, because the prince of this world is judged. All will be well, when his power is broken, who made all the mischief. As Satan is subdued by Christ, this gives us confidence, for no other power can stand before him. And of the day of judgment. The coming of the Spirit would be of unspeakable advantage to the disciples. The Holy Spirit is our Guide, not only to show us the way, but to go with us by continued aids and influences. To be led into a truth is more than barely to know it; it is not only to have the notion of it in our heads, but the relish, and savour, and power of it in our hearts. He shall teach all truth, and keep back nothing profitable, for he will show things to come. All the gifts and graces of the Spirit, all the preaching, and all the writing of the apostles, under the influence of the Spirit, all the tongues, and miracles, were to glorify Christ. It behoves every one to ask, whether the Holy Spirit has begun a good work in his heart? Without clear discovery of our guilt and danger, we never shall understand the value of Christ's salvation; but when brought to know ourselves aright, we begin to see the value of the Redeemer. We should have fuller views of the Redeemer, and more lively affections to him, if we more prayed for, and depended on the Holy Spirit.