Fe de erratas literally translates to "faith of errors" but is an idiomatic phrase meaning an "errata sheet" or "list of corrections." It's a formal term often found in books to correct mistakes.
Wos uses this phrase in a very clever and introspective way: "A lo sumo uso esta vida como fe de erratas" (At most I use this life as an errata sheet). He's suggesting that his life is a continuous process of acknowledging and correcting his mistakes, making it a unique and thought-provoking word choice in a song.
Wos's "MORFEO" is a powerful journey through the mind, exploring the search for meaning and peace in a chaotic world. He starts by reflecting on how unexpected things can save us, like "el beso de la calma" [the kiss of calm], and the heavy, anxious embrace of souls. It feels like he's caught in a dream, unable to run or shout, asking, "¿A dónde vas? ¿Por qué te escapas?" [Where are you going? Why do you escape?]
This song is all about grappling with inner turmoil and finding your way. Wos admits to not hiding his fears because they only betray him, and he uses life itself "como fe de erratas" [as an errata sheet] to correct his mistakes. He talks about the emptiness he feels, like a distant figure at sunset, but also about finding intrigue and a new perspective when someone unexpected arrives. It's a raw look at trying to break free from routines and the collective judgment of what's valid, ultimately finding warmth and a new beginning in the idea of someone else.