1 Peter 2:9-10

But you are a chosen race, a royal priesthood, a holy nation, a people of his own, so that you may proclaim the virtues of the one who called you out of darkness into his marvelous light.  You once were not a people, but now you are God’s people. You were shown no mercy, but now you have received mercy.

Hearing that you are chosen, and "God's special possession" (NIV), should bring courage and peace to your heart. As we consider the impossible move from no mercy, to mercy; the gospel is designed to ignite a response of praise and worship to God, glorifying Him among all people. Matthew 28:18-20 (NLT) says, "Therefore, go and make disciples of all the nations, baptizing them in the name of the Father and the Son and the Holy Spirit. Teach these new disciples to obey all the commands I have given you. And be sure of this: I am with you always, even to the end of the age.”