How do we know we are part of God's true people?

According to Philippians 3:3, the distinguishing marks of God's true people include worshiping God in the spirit, rejoicing in Christ Jesus, and having no confidence in the flesh. This means that true believers are spiritually minded and rely solely on Christ for acceptance with God. They do not place any trust in their own religious performance or fleshly accomplishments but instead recognize that their faith and righteousness come from Christ alone. This set of values reveals the inward transformation they have experienced through faith in the Gospel.