Or this there starts up a heresy of certain Philosophers [margin note: Epicureans] who taught the mistaken dogma that if God knows for what we shall pray, and, before we ask, knows what we need, our prayer is needlessly made to one who has such knowledge. To such we shortly reply, That in our prayers we do not instruct, but entreat; it is one thing to inform the ignorant, another to beg of the understanding: the first were to teach; the latter is to perform a service of duty.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).