Who is God? - His Nature
We know certain things to be true of God for one reason: in His mercy He has condescended to reveal some of His qualities to us. God is spirit, by nature intangible (John 4:24). God is One, but He exists as three Persons—God the Father, God the Son, and God the Holy Spirit (Matthew 3:16-17). God is infinite (1 Timothy 1:17), incomparable (2 Samuel 7:22), and unchanging (Malachi 3:6). God exists everywhere (Psalm 139:7-12), knows everything (Psalm 147:5; Isaiah 40:28), and has all power and authority (Ephesians 1; Revelation 19:6)