You were cold
As the blood through your bones
And the light which led us from our chosen homes
Mumford may be referring to God in this situation — as when you look deeper into the rest of the song you see some significant religious meaning (Which is evident in a few of Mumford’s dons) He’s saying that there was a change or occurrence in Mumfords life that he felt that was “cold hearted” and caused by God, meaning that he felt that what god did was unfair.
“The light which led us from our chosen homes” suggests that there was an unwilling change that was caused.
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