[M]ere knowledge of the truth will not give you the art of persuasion.
Geometry will draw the soul toward truth and create the spirit of philosophy.
Knowledge which is acquired under compulsion obtains no hold on the mind.
The passionate are like men standing on their heads, they see all things the wrong way.
... for this discovery of yours will create forgetfulness in the learners' souls, because they will not use their memories; they will trust to the external written characters and not remember of themselves.
What then is the right way to live? Life should be lived as play.