The stomach is not to be loaded, for there is nothing so hostile to thought as a full belly.
An immoderate diet is unhealthy, but a temperate one preserves strength.
Can you really ask what reason Pythagoras had for abstaining from flesh? For my part I rather wonder both by what accident and in what state of soul or mind the first man touched his mouth to gore and brought his lips to the flesh of a dead creature, set forth tables of dead, stale bodies, and ventured to call food and nourishment the parts that had a little before bellowed and cried, moved and lived.
The wise man should restrain his senses like the crane and accomplish his purpose with due knowledge of his place, time and ability.
A person should not eat until his stomach is full. Rather, he should eat until he has consumed approximately three quarters of his fill.
Cherish that which is within you, and shut off that which is without; for much knowledge is a curse.