Evagrius Ponticus: On the Right and Wrong use of Anger

 Anger is given to us so that we might fight against the demons and strive against every pleasure. Now it happens that the angels suggest spiritual pleasure to us and the beatitude that is consequent upon it so as to encourage us to turn our anger against the demons. But these, for their part, draw our anger to worldly desires and constrain us - contrary to our nature - to fight against our fellow men to the end that, blinded in mind and falling away from knowledge, our spirit should become a traitor to virtue.

+Evagrius Ponticus, from The Praktikos, #24

St. Macarius the Great: Thy will be done...

For why else is it written: "Thy will be done also on earth as in heaven" (Mt 6:10)? It is in order that, as the angels in heaven live together in accord with each other in the greatest unanimity, in peace and love, and there is no pride or envy there but they communicate in mutual love and sincerity, so in the same way the brethren should be among themselves.
+ St. Macarius the Great of Egypt, from The Fifty Spiritual Homilies and the Great Letter, homily 3, #1.