The poet wanted to use the most impressive language to describe God’s acts. He describes a cataclysmic event in these verses, with the seafloor erupting and mountains trembling. The whole earth could be moving and through it all, God is still our refuge and our strength.
3 C'est pourquoi nous sommes sans crainte quand la terre est bouleversée,Et que les montagnes chancellent au cœur des mers,