God never asks…

God never asks his servants to do what is impossible. The love and goodness of his Godhead is revealed as richly available. It is poured out like water upon all. God furnished to each person according to his will the ability to do something good. None of those seeking to be saved will be lacking in this ability, given by the one who said: ‘whoever gives you a cup of water to drink because you bear the name of Christ, will by no means lose his reward‘ (Mark 9:41).
— Saint Gregory of Nyssa (c. 335 – c. 395)

On human nature….

Sick, our nature demanded to be healed; fallen, to be raised up; dead, to rise again. We had lost the possession of the good; it was necessary for it to be given back to us. Closed in the darkness, it was necessary to bring us the light; captives, we awaited a Savior; prisoners, help; slaves, a liberator. Are these things minor or insignificant? Did they not move God to descend to human nature and visit it, since humanity was in so miserable and unhappy a state?
— Saint Gregory of Nyssa (c. 335 – c. 395)

When the mystery sanctifies…

The bread again is at first common bread; but when the mystery sanctifies it, it is called and actually becomes the Body of Christ. So too the mystical oil, so too the wine; if they are things of little worth before the blessing, after their sanctification by the Spirit each of them has its own superior operation. The same power of the word also makes the priest venerable and honorable, separated from the generality of men by the blessing bestowed upon him. Yesterday he was but one of the multitude, one of the people; suddenly he is made a guide, a president, a teacher of piety, an instructor in hidden mysteries.
–Saint Gregory of Nyssa (c. 335 – c. 395)