De Agricultura

For as the animal which chews the cud, again masticates the food which is put before it and devoured by it, when it again rises up to its teeth, so also the soul of the man who is fond of learning, when it has received any speculative opinions by hearing them, does not abandon them to forgetfulness, but quietly by itself revolves over every one of them again in its mind in all tranquillity, and so comes to the recollection of them all.