Jesus’ going away was necessary for us to enjoy the permanent Presence of the Holy Spirit…the third person of the Trinity. Yes, a person, not some cosmic force, in order that we may have a relationship with Him. (II Corinthians 13:14) The Counselor comes to encourage, comfort, guide, teach, exhort, admonish, and reveal truth…while witnessing about Jesus and undertaking His office while Jesus is away from the world. But just as Jesus’ Presence convicted unbelievers (John 15:22-24), the Holy Spirit exposes & convicts mankind’s inexcusable guilt & world-view of selfishness, greed, lust, and violence…but specifically rebukes humanity of the sin of rejecting Jesus Christ.