27. So, then, the world had not eternal life, because it had not received the Spirit; for where the Spirit is, there is eternal life; for the Spirit Himself it is Who effects eternal life. Wherefore I wonder why the Arians stir the question as to the only true God. For as it is eternal life to know the only true God, so, too, is it eternal life to know Jesus Christ; so, again, it is eternal life to know the Holy Spirit, Whom, as also the Father, the world does not see, and, as also the Son, does not know. But he who is not of this world has eternal life, and the Spirit, Who is the Light of eternal life, remains with him for ever.