The Consolation of Philosophy may have owed its popularity to its theme of the search for the summum bonum, the eternal verity beyond the vicissitudes of everyday life, a theme particularly appealing in a period of upheaval and danger such as the tenth and eleventh centuries. But it was much more than a work of conventional piety or Christian philosophy. It was essentially a classical work and its collection of verses in different metres, its mythological allusions and Neoplatonic cosmology, as well as its more Christian discussions of fate and free will, made it a key work in the intellectual ferment of the time. But it was a difficult work, requiring a critical apparatus of elucidation and explanation before its riches could be fully appreciated. This apparatus, in the form of glosses and scholia, necessarily had to draw upon a variety of sources.