If you know that he is righteous, you know that everyone who practices righteousness is born of him.
he is righteous: "Righteous" is dikaios and speaks of God as absolutely "just, equitable, fair" (Moulton 102). God is totally righteous and just in all of his dealings with mankind. He always does that which is right, just, moral, ethical, upright, and honest. Justice is an essential part of God’s nature, and He is always consistent with his nature.