Be moderate in order to taste the joys of life in abundance. – Epicurus

That moderation which nature prescribes, which limits our desires by resources restricted to our needs, has abandoned the field; it has now come to this — that to want only what is enough is a sign both of boorishness and of utter destitution. – Seneca (Seneca the Elder)

He will always be a slave who does not know how to live upon a little. – Horace

To many, total abstinence is easier than perfect moderation. – Saint Augustine of Hippo