Theophilus of Antioch, To Autolycus 1.3

You will ask me, "You who see, describe God's appearance for me." Listen, then: God's appearance is unspeakable and inexpressible, unable to be seen by fleshly eyes. He is incomprehensible in glory, ungraspable in size, unknowable in height, incomparable in power, unarguable in wisdom, unimitable in goodness, and unspeakable in benevolence. If I call Him light, I name His creation; if I call Him word, I name His beginning; if I call Him mind, I name His understanding; if I call Him spirit, I name His breath; if I call Him wisdom, I name His offspring; if I call Him power, I name His strength; if I call Him ability, I name His energy; if I call Him providence, I name His goodness; if I call Him kingdom, I name His glory; if I call Him Lord, I name His judge; if I call Him judge, I name Him just; if I call Him Father, I name Him the totality of all things; if I call Him fire, I name His wrath. You will then ask, "Does God get angry?" Yes, He does—He is angry toward those who practice evil, yet He is good, kind, and merciful toward those who love and fear Him. For He is the teacher of the godly and the Father of the righteous, but a judge and punisher of the ungodly.