Sorry to state the obvious but it's for the benefit of the noobs. It's clearly about God, since 1) she wrote this for Narnia, and Aslan the Lion represents Jesus, 2) she is a famous Christian singer and 3) it's got a distinctive spiritual feel to it. It's probably about someone who is new to their faith and just discovering Jesus' love.
Sorry to state the obvious but it's for the benefit of the noobs. It's clearly about God, since 1) she wrote this for Narnia, and Aslan the Lion represents Jesus, 2) she is a famous Christian singer and 3) it's got a distinctive spiritual feel to it. It's probably about someone who is new to their faith and just discovering Jesus' love.