But you shall receive power when the Holy Spirit has come upon you; and YOU SHALL BE WITNESSES TO ME, both in Jerusalem, and in all Judea and Samaria, and to the end of the earth. Acts 1:8

And when He has come, He will convict the world of sin, and of righteousness, and of judgement: of sin, because they do not believe in Me; of righteousness, because I go to My Father and you see Me no more; of judgement, because the ruler of this world is judged. John 16:8-11