But you are a chosen generation, a royal priesthood, a holy nation, His own special people, that you may proclaim the praises of Him who called you out of darkness into His marvelous light; (1 Peter 2:9, NKJV)
Some nations are ungodly, like Assyria (Isaiah 10:5-6). Some nations are angry and headstrong, like ancient Babylon (Habakkuk 1:6). Israel was a “sinful nation” during the days of Isaiah (Isaiah 1:4). But, the church of Christ is a spiritual nation of holy people (saints). We are sanctified in Christ Jesus – set apart from sin and made holy before Him (1 Corinthians 1:2). The call of the gospel is a call to holiness in heart and life, not a call to continue living in the defilement of sin (1 Thessalonians 4:1-7). “Come out from among them and be separate, says the Lord. Do not touch what is unclean, and I will receive you” (2 Corinthians 6:17). Christ’s kingdom is not of this world, therefore, as its citizens we must not be of this world and we must not love this world (John 18:36; 1 John 2:15-17). The church is a holy nation that constitutes a holy priesthood, serving in the house of God under the kingly and priestly rule of Jesus Christ (Zechariah 6:12-13; Psalm 110:1-4; Hebrews 1:8-9; 5:5-6). Therefore, let us “cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God” (2 Corinthians 7:1).