Cyprian:
“The liberty of believing or of not believing is placed in free choice. In Deuteronomy, it says: ‘Look! I have set before your face life and death, good and evil. Choose for yourself life, that you may live’ [Deut. 30:19]. Also in Isaiah: ‘And if you are willing and hear me, you will eat the good of the land’ [Isa. 1:19].”
Origen:
“He who has not denied himself, but denied Christ, will experience the saying ‘I also will deny him.’”