But you are a chosen race, a royal priesthood, a holy nation, a people for God's own possession, that you may show forth the excellencies of him who called you out of darkness into his marvelous light:

 Jesus himself had said--and doubtless the saying was in Peter's mind: "Let your light so shine before men that they may see your good works and give glory to your Father who is in heaven" ( Matthew 5:16). This was a line of thought which the Jews knew well. In one of the books written between the Old and the New Testaments it says: "If ye work that which is good, my children, both men and angels shall bless you; and God shall be glorified among the Gentiles through you, and the devil shall flee from you" (The Testament of Naphtali 8: 4). 