" Child, knowledge is a treasury and your heart is its strongbox. As you study all of knowledge, you store up for yourselves good treasures, immortal treasures, incorruptible treasures, which never decay nor lose the beauty of their brightness. In the treasure house of wisdom are various sorts of wealth,and many filing-places in the storehouse of your heart. In one place is put gold, in another silver, in another precious jewels. Their orderly arrangement is clarity of knowledge. Dispose and separate each single thing into its own place, this into its and that into its, so that you may know what has been placed here and what there. Confusion is the mother of ignorance and forgetfulness, but orderly arrangement illuminates the intelligence and secures memory.

(translation by Mary Carruthers) "

― Hugh of Saint-Victor ,