Lyric discussion by berlinsneakrz 

Cover art for The Last Beat Of My Heart lyrics by Siouxsie and the Banshees

A bridge of sighs; Solitude sails; In a wave of forgiveness; On angels' wings; --This part beckoned a different interpretation for me. It felt as if the one departing is the speaker. The speaker is dying and professing their infallible love until the very end. Almost like a last love letter.

[Edit: spacing doesn't work so I added punctuation]