We can know that the Holy Spirit is indeed a divine person because He possesses a mind, emotions, and a will. The Holy Spirit thinks and knows (1 Corinthians 2:10). The Holy Spirit can be grieved (Ephesians 4:30). The Spirit intercedes for us (Romans 8:2627). He makes decisions according to His will (1 Corinthians 12:711). The Holy Spirit is God, the third Person of the Trinity. As God, the Holy Spirit can truly function as the Comforter and Counselor that Jesus promised He would be (John 14:16, 26, 15:26).