Abba Agathon used to say, “I have never lain down to sleep and kept anger in my heart, or even a thought of enmity against any man; and I have never allowed any man to lie down to sleep keeping any anger against me.
[Abba Agathon, Apophthegmata Patrum]
Abba Abraham asked Abba Agathon, saying, “How is it that the devils make war upon me? And Abba Agathon said unto him, “Do the devils make war upon thee? But they do not make war against us so fiercely as we ourselves do with our own wishes, though they do make war against us in proportion as our wishes do. Our desires become devils, and they force us to fulfil them. Now if thou wishest to see against whom they have made war, [it is] against Moses and those who resemble him.”