Aliento translates to "breath" or "spirit". While seemingly simple, it carries a profound emotional weight in this song.
Il Divo sings, "Cuando me vi desnudo y sin aliento" (When I saw myself naked and without breath). Here, "sin aliento" goes beyond just lacking air; it evokes a feeling of being utterly depleted, lifeless, and without hope before love arrived. It's a powerful image of vulnerability and desperation.
"Por Ti Seré" is Il Divo's Spanish rendering of "You Raise Me Up," built around one vow repeated until it becomes a mantra: "Por ti seré más fuerte que el destino" [For you I will be stronger than destiny]. It opens near collapse — "Cuando me ví desnudo y sin aliento" [When I saw myself naked and breathless] — before naming the moment everything changed: "Llegaste tú como la luz del sol" [You came like the light of the sun].
From there the four voices circle back to "Yo sin ti estaba tan perdido" [I was so lost without you] three more times, each pass adding another layer of harmony, so the arrangement itself grows into the strength the lyrics describe.