There are many references in this song to people holding on the Christ, fighting with Him, believing from mountain top to bottom of the ocean. We all know that is a complete fantasy. People that live one hundred years here on earth probably believe a total of 4 minutes. And, even that meager belief is a complete gift from God. Still, the bold statements draw me in every listen and are completely redeemed by the inclusion of the actual truth of our state here on earth at the end of the song.
God is the source of strength and belief and the sustainer of our faith. Nothing can separate us from the love of God. Brilliant and truer words have never been written. The song is off base in centering on human effort to sustain our relationship with God. And then the Muse got ahold of the lyrics and reminded the song writers to get it right by adding the young child reciting actual truth and not the ridiculous fantasy which is the bulk of the song lyric.
So, listen with the understanding that the humanism of the entire song (minus the Romans 8:38-9 reference at the end) is a nice thought and completely devoid of reality. The reality is completely in the words of the four year old at the end.