How do we know that true followers of Christ exist?

The presence of true followers of Christ is validated through their response to His call. According to Scripture, those who genuinely follow Christ have been selected by divine grace and are characterized by their faithfulness and steadfastness. Revelation 17 describes these followers as 'called, chosen, and faithful,' emphasizing that they remain loyal even when faced with hardships. Authentic faith is evidenced by their willingness to leave everything behind and follow Him, as seen with the disciples who left their nets and their families to serve the Lord (Matthew 4:21-22). Such unwavering devotion reflects a profound transformation brought about by God's grace.