This line means, “Remember, beloved Fatherland, that heaven…” or more literally, “Think, oh beloved homeland, that heaven…” It directly addresses the homeland again as Patria querida, a beloved personified Mexico.

Piensa is an imperative form of pensar, meaning “think” or “consider.” Querida means “beloved” or “dear.” El cielo again means “heaven” in this context, continuing the religious imagery. The line is incomplete by itself; the next line explains what heaven has given Mexico.