Firmament literally translates to "firmament" or "sky". It's a poetic and somewhat archaic word that evokes a sense of grandeur and vastness.
In the song, it's used to describe the magical effect of love, comparing it to "hundreds of fireflies all the way up, to the firmament" (Ça envoie des centaines de lucioles tout là -haut, au firmament). This imagery elevates the feeling of love to something celestial and awe-inspiring, making it a memorable and unique word choice in the lyrics.
Mais Je T'aime is a raw, intimate conversation where two voices admit their cracks and bruises while stubbornly declaring, I love you. Grand Corps Malade’s gravelly spoken-word verses meet Camille Lellouche’s soaring vocals, creating a push-and-pull between doubt and devotion. Each line exposes past wounds, yet every chorus erupts with the same unwavering refrain, proving that even damaged hearts can beat loudly in unison.
The song paints love as a blazing fire: it crackles, glows and warms, but it can also scorch the skin of anyone who gets too close. The pair recall how their initial spark became an uncontrollable blaze fed by excess and passion. Still, they stand beside the flames, accepting vulnerability as the price of genuine connection. In the end, Mais Je T'aime says that loving imperfectly is better than not loving at all, and that the most fragile relationships can shine the brightest when both partners choose to keep the fire alive.