"But you are a chosen people,a royal priesthood,a holy nation,God’s special possession,that you may declare the praises of him who called you out of darkness into his wonderful light.Once you were not a people, but now you are the people of God;once you had not received mercy, but now you have received mercy." 1 Peter 2:9-10
According to the will of God's pleasure, He made a way for us to be adopted as children by faith in Jesus Christ. He reconciled us to Himself and as believers, are a part of that family for eternity. What rich grace He has lavished on us - that we can be called 'son' & 'daughter'.