What does it mean to be a citizen of God's kingdom?

Ephesians 2:19 speaks of believers no longer being strangers and foreigners, but fellow citizens with the saints. This citizenship signifies a legal standing within God's kingdom, implying acceptance, protection, and inheritance of His promises. As citizens, Christians are called to live in accordance with the values and commands of God's kingdom, which include love, mercy, and grace. It also reminds believers of their responsibility to reflect Christ's light in the world and share the hope found in Him with others.