 " Who Am I " is a song with a length of five minutes and thirty @-@ five seconds . According to the sheet music published by Musicnotes.com , it is in set common time in the key of B major and has a tempo of 66 beats per minute . Mark Hall 's vocal range in the song spans from the low note of G ♯ 3 to the high note of F ♯ 3 . " Who Am I " has been described as a pop rock and adult contemporary ballad . Based around the piano and featuring orchestral sounds , it begins slowly before building up into a musical crescendo . Lyrically , the song is centered in praising God , relating a theme of <unk> without Christ . 
