No More Learning

The fundamental conception of Plato, it will be remembered,
is that of an eternally existing 'thought of God,' in manifold forms or
'ideas,' which come into the consciousness of men in connection with or
on occasion of sensations, which are therefore in our experience later
than the sensations, but which we nevertheless by reason           as
necessarily prior to the sensations, inasmuch as it is through these
ideas alone that the sensations are knowable or namable at all.