make this explicit one should know that it is possible to understand a
book in four different ways, and that it ought to be explained chiefly
in this manner.

The one is termed Literal, and this is that which does not extend
beyond the text itself, such as is the fit narration of that thing
whereof you are discoursing, an appropriate example of which is the
third Song, which discourses of Nobility.

Another is termed Allegorical, and it is that which is concealed under
the veil of fables, and is a Truth concealed under a beautiful
Untruth; as when Ovid says that Orpheus with his lute made the wild
beasts tame, and made the trees and the stones to follow him, which
signifies that the wise man with the instrument of his voice makes
cruel hearts gentle and humble, and makes those follow his will who
have not the living force of knowledge and of art; who, having not the
reasoning life of any knowledge whatever, are as the stones. And in
order that this hidden thing should be discovered by the wise, it will
be demonstrated in the last Treatise. Verily the theologians take this
meaning otherwise than do the poets: but, because my intention here is
to follow the way of the poets, I shall take the Allegorical sense
according as it is used by the poets.

The third sense is termed Moral; and this is that which the readers
ought intently to search for in books, for their own advantage and for
that of their descendants; as one can espy in the Gospel, when Christ
ascended the Mount for the Transfiguration, that, of the twelve
Apostles, He took with Him only three. From which one can understand
in the Moral sense that in the most secret things we ought to have but
little company.