A quote
There are two strong supports to the soul—trust in the truth and confidence; both are the result of admonition. For men believe it, and when belief is established, the soul receives great inspiration and is filled with confidence. Therefore, admonition is not superfluous. Marcus Agrippa, a great-souled man, the only person among those whom the civil wars raised to fame and power whose prosperity helped the state, used to say that he was greatly indebted to the proverb “Harmony makes small things grow; lack of harmony makes great things decay.”
Seneca·Letter 94 (§46)·trans. Gummere