From Burnet's Note on the Sources
Under this head we have chiefly to consider the commentators on Aristotle in so far as they are
independent of the Theophrastean tradition. Their chief characteristic is what Simplicius calls εὐγνωμοσύνη,
that is, a liberal spirit of interpretation, which makes all early philosophers agree with one another in
upholding the doctrine of a Sensible and an Intelligible World. It is, however, to Simplicius more than
any one else that we owe the preservation of the fragments. He had, of course, the library of the
Academy at his disposal, at any rate up to A.D. 529.