I Can Only Imagine: A Memoir by by Bart Millard. The true story that inspired the hit song and major motion picture. MercyMe’s crossover hit, “I Can Only Imagine,” has touched millions of people around the world. But few know about the pain, redemption, and healing that inspired it. Now Bart Millard, award-winning recording artist and lead singer of MercyMe, shares how his dad’s transformation from abusive father to man of God sparked a divine moment in music history. Go behind the scenes of Bart’s life—and the movie based on it—to discover how God repaired a broken family, prepared Bart for ministry through music, and wrote the words on his heart that would change his life forever.