An image of the quality of somebody’s love. The Song of Solomon is love poetry: here the cherished urges her sweetheart to cleave to her with an undying affection. “Set me as a seal upon thine heart, as a seal upon thine arm: for love is strong as death; jealousy is cruel as the grave: the coals thereof are coals of fire, which hath a most vehement flame.” Song of Solomon 8:6 KJV