Burrough's was much concerned to promote (1)peace among believers of various 'persuasions' (2)peace and contentment in the hearts of individual believers during what he describes as 'sad and sinking times.' "The Rare Jewel" concentrates upon this second aim. It is marked by sanity, clarity, aptness of illustraton, and warmth of appeal to the heart. 'There is an ark that you may come into, and no men in the world may live such comfortable, cheerful and contented lives as the saints of God'.