“Peter said, Ananias, why hath Satan filled thine heart to lie to the Holy Ghost, and to keep back part of the price of the land? Whiles it remained, was it not thine own? and after it was sold, was it not in thine own power? why hast thou conceived this thing in thine heart? thou hast not lied unto men, but unto God.” (Acts 5:3, 4)
Many Trinitarians use this as conclusive evidence that the Holy Spirit is God, therefore being a third separate being, God the Holy Spirit. The Holy Spirit is the Spirit of God. “And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption.” (Ephesians 4:30) The word holy is an adjective in every instance. God has a Spirit, and His Spirit is holy. To lie to God’s Spirit is to lie to God. That is because His Spirit is Himself. If I were to lie to your spirit, you would not suppose that I lied to someone other than yourself.