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.