This is true perfection: not to avold a wicked life because, like slaves, we servilely fear punishment, nor to do good because we hope for rewards, as if cashing in on the virtuous life by some businesslike and contractual arrangement. On the contrary, disregarding all those things for which we hope and which have been reserved by promise, we regard falling from God's friendship as the only thing dreadful, and we consider becoming God's friend the only thing worthy of honor and desire.

The Life of Moses

Gregory of Nyssa