This is how the Shulamite, in the Song of Solomon, described her love relationship with her husband. Her love for Solomon was a passionate fire in her soul. These two metaphors are descriptions for the strength and passion of marital love. First, consider the comparison of love to the strength of death. This is a great illustration because death is so powerful and all consuming.
Death takes everyone sooner or later.
It never gives up . This same love was demonstrated by Christ. He loved you to the point of death. His strong love drove Him to sacrificially lay His life down. His love is tenacious.