Ineffable

We will say many things and not reach the end,
But the sum of our words is seen in this: “He is the all.”
How shall we ever be able to adequately praise Him?
For He is greater than all His works.
Fearful is the Lord and exceedingly great,
And wondrous is His power.
Glorify the Lord and exalt Him as much as you are able,
For He will surpass even that.
And when you exalt Him, put forth all your strength;
Do not grow weary, for you cannot exalt Him enough.
Who has seen Him and will describe Him?
And who can magnify Him as He truly is?
There are yet many hidden things greater than these,
For we have seen but few of His works.
For the Lord made all things
And gives wisdom to the godly. (Sirach 43:27–33)

Those who do not know what to ask for in prayer, if they are moved to express something sacred regarding the Spirit, limit the flow of their words to maintain measure, as though they had already given Him enough honor. One should mourn their weakness; we, however, do not have words to express thanks for all the gifts of which we experience the effects. The Spirit in fact surpasses all knowledge and thwarts the possibility of any speech that fails to conform to at least a minimum of His dignity, according to the words of the book called Wisdom: “Exalt Him as you can, because He is higher still. In exalting Him, you will increase your strength. Do not grow weary; otherwise you will not reach Him.”

Basil of Caesarea, On the Holy Spirit 28.70

Indeed, with what understanding can a person apprehend God when he does not even apprehend that very intellect of his own by which he wants to know God? And if he does already understand this, let him diligently consider then that there is nothing better in his nature than his intellect. Let him see, then, if he discovers in it any features of form, brilliance of colors, spatial broadness, distance of parts, extension of mass, spatial dislocation, or anything else of this kind. Certainly we find nothing of this sort in that which is best in us, that is, in our intellect, with which we attain wisdom to the extent we are able. So then, what we do not find in what is best in us, we must not look for in Him who is much better than what is best in us. We conceive, therefore—if we can and to the extent we can—of good without quality, greatness without quantity, creator without necessity, in the first place without location, containing all things but without exteriority, entirely present everywhere without place, eternal without time, author of changeable things while remaining absolutely unchanged and foreign to all passivity. Whoever conceives of God in this way, though he still cannot discover perfectly what He is, at least avoids, with pious diligence and to the extent possible, attributing to Him what He is not.

Augustine, On the Trinity 5.1.2