Nicene and Post-Nicene Fathers, Vol. V:
A Treatise on the Soul and its Origin.: Chapter 4

Chapter 4.—To Believe the Soul is a Part of God is Blasphemy.

And if you happened to suppose, before receiving the instruction from this teacher, which you are rejoicing to have received, that the human soul is a portion of God’s nature, then you were ignorant how false and terribly dangerous this opinion was. And if you only were taught by this person that the soul is not a portion of God, then I bid you thank God as earnestly as you can that you were not taken away out of the body before learning so important a lesson. For you would have quitted life a great heretic and a terrible blasphemer. However, I never could have believed this of you, that a man who is both a catholic and a presbyter of no contemptible position like yourself, could by any means have thought that the soul’s nature is a portion of God. I therefore cannot help expressing to your beloved self my fears that this man has by some means or other taught you that which is decidedly opposed to the faith which you were holding.