This Song I Wrote Comes from The Book of Isaiah And The 1st Chapter Of the Gospel Of Mark. We Sing This Song In Our Church— There Is A Lead Part Followed by The Brothers And Sisters Echoing The Words. Prepare The Way of the Lord Sing Hallelujah/Make His Paths Straight Every Valley Shall Be Filled Every Valley Shall Be Filled And Every Mountain Made Low And Every Mountain Made Low Every Valley Shall Be Filled Every Valley Shall Be Filled And Every Mountain Made Low And Every Mountain Made Low Before the Day Of the Lord