I agree with the comments that this is about depression and talking to God, especially with the references to drowning and "calling my father".
I just wanted to add that the last verse:
"I start to part two halves of my heart in the dark and I....
.... Empty sky, no way that's me 'cause the other half of my heart's asleep"
was originally on the song Blasphemy, from No Phun Intended- an album Tyler wrote when he was younger (before twenty one pilots).
I agree with the comments that this is about depression and talking to God, especially with the references to drowning and "calling my father".
I just wanted to add that the last verse: "I start to part two halves of my heart in the dark and I.... .... Empty sky, no way that's me 'cause the other half of my heart's asleep" was originally on the song Blasphemy, from No Phun Intended- an album Tyler wrote when he was younger (before twenty one pilots).