I think this song is about two people that are in a realationship. But the male in the relationship loves the female. And he is trying too say that loving her and havein a relationship with her is like moving a mountain.
This could be in a guys situation or in a girls. Its a really nice song and very touchy. I can relate too this sonmg because I was wit someone for a year. And through the whole rrelationship I'm loved him more then he loved me. And it hurts.