Believers in Christ are ambassadors for Christ (2 Cor 5:20), which means we represent Christ’s kingdom on earth. An ambassador is someone who lives in one country but represents another. Believers were made citizens of the new kingdom when they were born again.

We are only here on earth as ambassadors for that kingdom. This means nationalism has no place in Christianity because the USA, China, and Russia will be destroyed on Judgment Day. Only God’s people will be saved because they are citizens of the Kingdom of Heaven, and as for now, they are foreigners on earth who work for the heavenly embassy.

This is because believers are in the world but not of the world (John 17:13-19), and are citizens of heaven (Phil 3:20-21). When we are “born again”, we get birthright citizenship in heaven because we are now classified as children of God (John 1:10-13, 1 John 3:9-10, Rom 8:7-17). God is a spirit; therefore, his children are only those born again in spirit and receive eternal life (John 3:1-15). The actual home of believers is the world to come (Heb 13:10-14).