Obscura means "dark" or "obscure." While similar to "oscura," the spelling with 'b' is an older, more poetic form, adding a touch of classic drama to the lyrics.
In "Historia De Un Amor," Luis Miguel uses it to describe a life without his beloved: "Ay, qué vida tan obscura / Sin tu amor no viviré" (Oh, what a dark life / Without your love I will not live). This word powerfully conveys the depth of his despair and the profound impact of his lost love, making it a memorable and emotionally charged choice.
"Historia de un Amor" is a song about a loss the singer has not learned to live with. He speaks straight to someone who is no longer beside him, and the first thing he says is that his soul now holds nothing but loneliness. This is less a breakup than an absence he keeps running into.
The questions that follow are aimed at God rather than at her. If he can no longer see her, why was he made to love her in the first place? The only answer he can find is that it was to make him suffer more. Loving her had been the closest thing he had to faith. He says that adoring her was his religion, and that in her kisses he found the warmth that love and passion gave him.
The chorus names the whole thing plainly. This is the story of a love with no equal, one that taught him all the good and all the bad at once. It gave his life light, and then put that light out. What is left is a dark life, and a line he does not soften: without your love I will not live.
The song was written in 1955 by the Panamanian composer Carlos Eleta Almaran and has been recorded hundreds of times across Latin America. Luis Miguel's version keeps the bolero's slow, unhurried pace, which leaves each line plenty of room to land.