“The Sermon on the Mount is the greatest example we have of how to ‘reprove the world of sin, of righteousness, and of judgment.’
In Matthew chapter 5, Christ reproves the multitudes of sin by showing the essence of the Law.
In chapter 6, He teaches on true righteousness, the essence of which is to cause men to glorify our Father which is in heaven, not to draw attention to ourselves.
Then, in chapter 7, He teaches concerning judgment. He warns the multitudes that if they judge others as guilty for doing the same things they themselves are practicing, instead of pulling the log out of their own eye first, they are obviously hypocrites.
If we will follow this method of preaching the gospel, then we can expect the Holy Spirit to help us. For Jesus Himself promised that this divine Helper would reprove the world of sin, of righteousness, and of judgment. He does this by causing our words to make saving impressions on the minds of men.”
Herald and preach the Word! Keep your sense of urgency [stand by, be at hand and ready], whether the opportunity seems to be favorable or unfavorable. [Whether it is convenient or inconvenient, whether it is welcome or unwelcome, you as preacher of the Word are to show people in what way their lives are wrong.] And convince them, rebuking and correcting, warning and urging and encouraging them, being unflagging and inexhaustible in patience and teaching. 2 Timothy 4:2 (Amplified Bible)