Gregory of Nyssa, on Ps 102:8

“The ford is compassionate and merciful: longsuffering and plenteous in mercy.”

“God is not an expression, and he does not have his essence in voice or utterance. God is of himself what also he is believed to be. He is named by those who call on him, not what he is essentially (for the nature of him who alone is unspeakable), but he receives his names from what are believed to be his works in regard to our life. To take an instance ready at hand, when we speak of him as God, we so name him from his overlooking and surveying all things and seeing through the things that are hidden. But if his essence is prior to his works, and if we understand his works by our senses and express them in words as we are best able, why should we be afraid of calling things by words of later origin than themselves? For if we stop interpreting any of the attributes of God until we understand them, and if we understand them only by what his works teach us, and if his power precedes its exercise and depends on the will of God, while his will resides in the spontaneity of the divine nature, are we not clearly taught that the words that represent things are of later origin than the things themselves and that the words that are framed to express the operations of things are reflections of the things themselves? And that this is so, we are clearly taught by holy Scripture, by the mouth of great David, when, as by certain peculiar and appropriate names, derived from his contemplation of the works of God, he thus speaks of the divine nature: "The Lord is full of compassion and mercy, long-suffering, and of great goodness." Now what do these words tell us? Do they indicate his operations or his nature? No one will say that they indicate anything but his operations. At what time, then, after showing mercy and pity, did God acquire his name from the display of his works? Was it before a person's life began? But who was there to be the object of pity? Was it, then, after sin entered into the world? But sin entered after humankind. The exercise, therefore, of pity, and the name itself, came after humanity. What then? Will our adversary [Eunomius], wise as he is above the prophets, convict David of error in applying names to God derived from his opportunities of knowing him? Or, in contending with him, will he use against him the pretense in his stately passage as out of a tragedy, saying that "he glories in the most blessed life of God with names drawn from human imagination, whereas it gloried in itself alone, long before people were born to imagine them"? The psalmist's advocate will readily admit that the divine nature gloried in itself alone even before the existence of human imagination but will contend that the human mind can speak only so much in respect of God as its capacity, instructed by his works, will allow. "For," as says the Wisdom of Solomon, "by the greatness and beauty of the creatures proportionably the Maker of them is seen."”

Imported from an open dataset — not yet checked against the printed edition.