O ineffable Creator, Who, out of the treasure of Thy wisdom, hast ordained three hierarchies of Angels, and placed them in wonderful order above the heavens, and hast most wisely distributed the parts of the world; Thou, Who are called the true fountain of light and wisdom, and the highest beginning, vouchsafe to pour upon the darkness of my understanding, in which I was born, the double beam of Thy brightness, removing from me all darkness of sin and ignorance. Thou, Who makest eloquent the tongue of the dumb, instruct my tongue, and pour on my lips the grace of Thy blessing. Give me quickness of understanding, capacity of retaining, subtlety of interpreting, facility in learning, and copious grace of speaking. Guide my going in, direct my going forward, accomplish my going forth; through Christ our Lord.
(I write about this prayer in Why Study History?: Reflecting on the Importance of the Past)