I have experienced distinct times when I have played the piano or synthesizer and have literally been praying with my instrument. There was a deep internal witness that assured me that the melodies, chords or musical textures I was playing were speaking profoundly into the hearts of people.
There is a particular instance I can recall when a person was kneeling at the altar and was obviously interacting with the Lord in worship. I can still see the brokenness upon his face and the agony of his soul. I
suddenly felt the urge within me to break away from the rehearsed songs that I had prepared. Motioning to the rest of the worship team to cease playing, I then began focusing my faith and my music upon this one person. It is as if I was playing to the pain or the need that was in front of me, perhaps much the same way as David played for Saul.
I allowed my heart to open up to the Lord and began asking Him for chords, textures and melodic ideas that would minister deeply to this young man. Suddenly, as if this person and I were somehow plugged into each other by a single power line, the music began to go into him almost tangibly. I watched in awe as the music seemed to wash over him and bring him peace and release.
I knew from that instant that music, instruments and voices could intercede in the Spirit, and that they could speak and interpret the voice of God to the human heart.