Jaramillo sings with that unique, nasal, yet heartbreakingly sincere tenor about a love story where he was once the king. In the first verse, he paints the portrait of a man who walked away thinking he was irreplaceable. He was the one who caused the tears. He was the one who left the other person crying on a pillow.

The shift is devastating. The "today" in the song is not one of hatred, but of desolate indifference. Jaramillo laments that the same lips that once swore eternal love now don't even remember his name. This is the genius of the song: Jaramillo doesn’t sing about a dramatic fight or a betrayal; he sings about the slow, quiet erosion of memory. He realizes that he is the only one still holding onto the past.

It is impossible to separate the song from the tragic biography of its performer. Julio Jaramillo died in 1978 at the age of 42, a victim of a life lived too fast—excesses of alcohol and emotional turmoil. In many ways, his death cemented "Ayer y Hoy" as prophecy.