2 Take then what you have asked for; but know that there are countless things in the book to be abhorred, and that, as the Lord says, you will have to walk among scorpions and serpents. It begins by saying that Christ was made God's son not born; that God the Father, as He is by nature invisible, is invisible even to the Son; that the Son, who is the likeness of the invisible Father, compared with the Father is not the truth but compared with us who cannot receive the truth of the almighty Father seems a figure of the truth so that we perceive the majesty and magnitude of the greater in the less, the Father's glory limited in the Son; that God the Father is a light incomprehensible and that Christ compared with him is but a minute brightness, although by reason of our incapacity to us he appears a great one. The Father and the Son are compared to two statues, a larger one and a small; the first filling the world and being somehow invisible through its size, the second cognisable by the eyes of men. God the Father omnipotent the writer terms good and of perfect goodness; but of the Son he says: “He is not good but an emanation and likeness of goodness; not good absolutely but only with a qualification, as 'the good shepherd' and the like.” The Holy Spirit he places after the Father and the Son as third in dignity and honour. And while he declares that he does not know whether the Holy Spirit is created or uncreated, he has later on given his own opinion that except God the Father alone there is nothing uncreated. “The Son,” he states, “is inferior to the Father, inasmuch as He is second and the Father first; and the Holy Spirit which dwells in all the saints is inferior to the Son. In the same way the power of the Father is greater than that of the Son and of the Holy Spirit. Likewise the power of the Son is greater than that of the Holy Spirit, and as a consequence the Holy Spirit in its turn has greater virtue than other things called holy.”
Source: Letters (New Advent)