The same applies to straight as well as to circular form, to colours, to the
good, the, beautiful, the just, to all bodies whether manufactured or coming
into being in the course of nature, to fire, water, and all such things, to
every living being, to character in souls, and to all things done and
suffered. For in the case of all these, no one, if he has not some how or
other got hold of the four things first mentioned, can ever be completely a
partaker of knowledge of the fifth. Further, on account of the weakness of
language, these (i.e., the four) attempt to show what each thing is like, not
less than what each thing is. For this reason no man of intelligence will
venture to express his philosophical views in language, especially not in
language that is unchangeable, which is true of that which is set down in
written characters.