De civilitate morum puerilium libellus

...who, for your salvation, when he was above all the heavens, descended to earth; when he was God, he deigned to become man, so that he might make you a god. While the mysteries are being performed, with the whole body composed for religion, let the mind be turned toward Christ. To touch the ground with one knee while the other is erect, upon which the left elbow rests, is a gesture of the impious soldiers who, mocking the Lord Jesus, said: "Hail, King of the Jews." You, lower both, with the rest of your body also bent somewhat in veneration. For the remaining time, let something be read from a book, whether it be something noble or of saving doctrine, or let the mind meditate on something heavenly. At that time, to mutter trifles into the ear of a neighbor is the behavior of those who do not believe that Christ is present there; to carry wandering eyes here and there is the behavior of the insane. Consider that you have entered the temple in vain unless you depart from there better and purer.

OF CONVIVIALITIES.

At banquets, let there be hilarity, let there be no petulance; do not recline unless you have washed, but before...