by St. Gregory of Nyssa
But do ye all, as many as are made glad, by the gift of regeneration, and make your boast of that saving renewal, show me, after the sacramental grace, the change in your ways that should follow it, and make known by the purity of your conversation the difference effected by your transformation for the better. For of those things which are before our eyes nothing is altered: the characteristics of the body remain unchanged, and the mould of the visible nature is nowise different. But there is certainly need of some manifest proof, by which we may recognize the new-born man, discerning by clear tokens the new from the old. And these I think are to be found in the intentional motions of the soul, whereby it separates itself from its old customary life, and enters on a newer way of conversation, and will clearly teach those acquainted with it that it has become something different from its former self, bearing in it no token by which the old self was recognized.