Christ's message in all its richness must live in your hearts. Teach and instruct one another with all wisdom. Sing psalms, hymns, and sacred songs; sing to God with thanksgiving in your hearts.
I write to you, my children, because you know the Father. I write to you, fathers, because you know him who has existed from the beginning. I write to you, young people, because you are strong; the word of God lives in you, and you have defeated the Evil One.
But you belong to God, my children, and have defeated the false prophets, because the Spirit who is in you is more powerful than the spirit in those who belong to the world.
So those who believe in the Son of God have this testimony in their own heart; but those who do not believe God, have made a liar of him, because they have not believed what God has said about his Son.