CAB: John was in the Spirit, and when he was, he saw the great and wonderful day of the Lord Jesus and all His holy power. The future was about to unfold for God was about to teach him. John did not say it was a trumpet. It was like a trumpet. Now when a trumpet is blown it has an urgency about it. It is like the herald, the king's messenger, coming to the people. He blows on a trumpet. It is an urgent call. The people gather to listen. (Israel was always assembled by the sounding of a trumpet.) Something important is at hand. "Listen to it." So this voice had the same urgency of appeal as did the trumpet. Clear and strong it was, startling and awakening. Oh, that we might hear the voice of God as a trumpet this day, for it is the 'Gospel Trumpet' sounding forth the 'Word of Prophecy' to make us aware of, and prepared for, what is coming upon the earth.