I realize that spirituality and faith are personal things and that not everyone might appreciate something faith based. Especially, when facing cancer. I think I’d be angry. However, I think my friend would like this song. It used to be quite popular. It can be interpreted in many different ways. I’m providing this link that shows the lyrics, which I find uplifting for myself. I’ve listened to it a lot when struggling with my Type I diabetes. In case the link doesn’t work, the song is You Say.
https://m.youtube.com/watch?v=HqpNGYbcy3U