Gregory of Nazianzus’ credal cardiological calligraphy: “If your heart is written upon in some other way than as my teaching demands, come and have the writing changed. I am no unskilled caligrapher of these truths. I write that which is written upon my own heart; and I teach that which I have been taught, and have kept from the beginning up to these gray hairs. Mine is the risk; mine also is the reward of being the director of your soul, and consecrating you by baptism. But if you are already rightly disposed, and marked with the good inscription, see that you keep what is written, and remain unchanged in a changing time about the unchanging Reality.”