Out of moderation a pure happiness springs. – Johann von Goethe

The man of virtuous soul commands not, nor obeys. – Percy Bysshe Shelley, Queen Mab

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)