Never do anything which thou dost not understand; but learn all thou oughtest to know, and by that means thou wilt lead a very pleasant life.
In no wise neglect the health of thy body; but give it food and drink in due measure, and also the exercise of which it has need. By measure, I mean what will not incommode thee.
Accustom thyself to a way of living that is neat and decent, without luxury. Avoid all things that will occasion envy, and be not expensive out of season, like one who knows not what is decent and honorable.
Be neither covetous nor niggardly. A due measure is excellent in these things!
Do only the things that cannot hurt thee, and deliberate before thou doest them.
From the Golden Verses of Pythagoras