Fronteras translates to "borders" or "frontiers". While it's a common word, its use in this romantic context is particularly evocative and interesting.
Chayanne sings, "Para mí ya no quedan fronteras" (For me, there are no more borders left). He uses this word metaphorically to express how love has removed all limitations and boundaries in his life, allowing him to experience a boundless and free existence. This powerful imagery makes it a compelling word choice.
"La Fuerza De Amar" ("The Strength of Loving") is Chayanne's account of how loving someone remade him. He opens with the change itself: "Cambié para mejor a fuerza de amar" ("I changed for the better by the strength of loving"), and credits the relationship with filling his heart "de lunas y estrellas" ("with moons and stars") and teaching him to move mountains and tear down barriers.
The chorus turns that change into confidence, almost boasting: "Y puedo detener la luna en un beso" ("And I can stop the moon in a kiss") and "soy dueño del tiempo" ("I own time") — grand images for the feeling that nothing is impossible anymore. He undercuts the hyperbole with the plainest line in the song, "El secreto es que te quiero de veras" ("The secret is that I really love you"), naming honesty, not magic, as what actually changed him.