According to the apostle, Lord, your Holy Spirit fully understands and penetrates your inmost depths; he also intercedes on my behalf, saying to you things for which I cannot find the words.
Nothing can penetrate your being but what is divine already; nor can the depths of your immense majesty be measured by any power which itself is alien or extrinsic to you.
So, whatever enters into you is yours already, nor can anything which has the power to search your very depths ever have been other than your own.
Your Holy Spirit proceeds through your Son from you; though I may fail to grasp the full meaning of that statement, I give it nonetheless the firm assent of my mind and heart.
I may indeed show dullness and stupidity in my understanding of these spiritual matters; it is as your only Son has said: “Do not be surprised if I have said to you: You must be born again. Just as the wind blows where it pleases and you hear the sound of it without knowing where it is coming from or going to, so will it be with everyone who is born again of water and the Holy Spirit.” (Jn 3:7-8)
By my regeneration I have received the faith, but I am still ignorant; and yet I have a firm hold on something which I do not understand. I am born again, capable of rebirth but without conscious perception of it.
The Spirit abides by no rules; he speaks what he pleases, where he pleases, and when he pleases. We are conscious of his presence when he comes, but the reasons for his approach or his departure remain hidden from us.
John tells us that all things came into being through the Son who is God the Word abiding with you, Father, from the beginning.
Paul in his turn enumerates the things created in the Son, both visible and invisible, in heaven and on earth.
And while he is specific about all that was created in and through Christ, of the Holy Spirit he considers it enough simply to say that he is your Spirit.
Therefore I concur with those chosen men in thinking that just as it is not expedient for me to venture beyond my mental limitation and predicate anything of your only begotten Son save that, as those witnesses have assured us, he was born of you, so it is not fitting for me to go beyond the power of human thought and the teaching of those same witnesses by declaring anything regarding the Holy Spirit other than that he is your Spirit.
Rather than waste time in a fruitless war of words, I would prefer to spend it in the firm profession of an unhesitating faith.
I beg you therefore, Father, to preserve in me that pure and reverent faith and to grant that to my last breath I may testify to my conviction.
May I always hold fast to what I publicly professed in the creed when I was baptized in the name of the Father and of the Son and of the Holy Spirit.
May I worship you, the Father of us all, and your Son together with you and may I be counted worthy to receive your Holy Spirit who through your only Son proceeds from you.
For me there is sufficient evidence for this faith in the words: “Father, all that I have is yours, and all that is yours is mine,” spoken by Jesus Christ my Lord who remains, in and from and with you, the God who is blessed for endless ages. Amen.
The Trinity XII, 55-56: PL 10, 468-472
Hilary (315-367) was elected bishop of Poitiers in 353. Because of his struggles with the Arians and his treatise on the Trinity, for which he was exiled, he has been called “the Athanasius of the West.” He also wrote a commentary on Saint Matthew’s gospel and another on a selection of the psalms. His style is difficult and obscure and he makes much use of allegory.