Be Thou My Vision, a traditional Christian hymn from Ireland, is now a staple song in modern sacred music. In Brian Mueller's warm and lyrical arrangement for a 4.3-octave (low A) marimba, the piece is structured in three different parts, organized by different the keys D major, F major, and A major. These segments are separated by chorale passages which give the arrangement an improvisatory and ethereal feel. The main melody of the piece, however, is not obscured by this improvisatory feel and is always present and audible to the listener.