Many modern scholars have found the asceticism expressed in Plato unacceptable; it does not sound like the advice of a reasonable man in the Cartesian tradition.
Thomas McEvilleyIn the Republic Plato presents a theory of personality. ... He speaks of three faculties, the appetitive, the ambitious, and the rational. ... The most dangerous faculty according to Plato is the appetitive for it bonds the soul to the senses and the realm of sense objects.
Thomas McEvilleyTo Plato the desire for excessive and special foods ... is a hindrance to the soul's attainment of intelligence.
Thomas McEvilley