St Gregory of Nyssa: ...Τherefore be perfect, just as your heavenly father is perfect...

Although, on the whole my argument has shown that what is sought for is unattainable, one should not disregard the commandment of the Lord which says, "Therefore be perfect, just as your heavenly father is perfect."

For in the case of those things which are good by nature, even if men of understanding were not able to attain to everything, by attaining even a part they could yet gain a great deal.

St Gregory of Nyssa