In order to safeguard this virtue of faith in its integrity, We declare it to be very profitable and consistent with the requirements of the time, that each one, according to the measure of his capacity and intelligence, should make a deep study of Christian doctrine, and imbue his mind with as perfect a knowledge as may be of those matters that are interwoven with religion and lie within the range of reason.
initium in ea parte circi ortum, quae Palatino Caelioque montibus contigua est, ubi per tabernas, quibus id mercimonium inerat, quo flamma alitur, simul coeptus ignis et statim validus ac vento citus longitudinem circi conripuit.vatican.va vatican.va