{And he} (kai ekeinos). Emphatic demonstrative masculine
pronoun. {When he is come} (elth(936e)). Second aorist active
participle of erchomai, "having come" or "coming." {Will
convict the world} (elegxei ton kosmon). Future active of
elegch(935c), old word for confuting, convicting by proof already in
 3:29  8:46 . Jesus had been doing this ( 7:7 ), but this is
pre-eminently the work of the Holy Spirit and the most needed
task today for our complacent age. {In respect of sin} (peri
hamartias). Concerning the reality of sin as missing the mark
and as wronging God and man, and not a mere slip or animal
instinct or devoid of moral responsibility or evil. Some
scientists and psychologists (Freudians and behaviourists) seem
bent on destroying man's sense of sin. Hence crime waves even in
youth. {And of righteousness} (kai peri dikaiosun(8873)). The
opposite of "sin" and to be yearned for after conviction. Cf.  Ro
1:19-3:21  about the necessity of the God-kind of righteousness
and the Sermon on the Mount for Christ's idea of righteousness.
{And of judgment} (kai peri krise(9373)). As certain to come as
condemnation because of sin and the lack of righteousness. These
are not played out motives in human life, but basal. For this
ministry we have the help of the Paraclete. The Paraclete is here
spoken of "not as man's advocate with God ( 1Jo 2:1 ), but as
Christ's advocate with the world" (Bernard).