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.
Even when your spirit is calm do not let your body relax, and when your body is relaxed do not let your spirit slacken. Do not let your spirit be influenced by your body, or your body be influenced by your spirit.
Those who are slaves to their appetites cannot preserve their reason, their memory, or their senses in their full vigour; for a full belly does not produce a fine mind.
If the body be feeble, the mind will not be strong. The sovereign invigorator of the body is exercise, and of all the exercises walking is best. A horse gives but a kind of half exercise, and a carriage is no better than a cradle.