Reason and authority are the two brightest lights of the world.

Explanation

Law is sustained by two pillars: the rational principle that justifies it and the legitimate authority that enforces it — neither alone is sufficient. (Duplicate maxim — see also 12.1.13.)

Where this applies

• A law has both rational justification and legitimate authority behind it.
• Someone questions whether a rule has both reason and proper authority.

See also

• 1.5.259 Reason is a ray of divine light.
• 2.2.1 A delegated authority cannot be again delegated.
• 12.1.13 Reason and authority are the two brightest lights in the world.