Related Clues:

• Principle
• Adage
• Words to live by
• If A = B and B = C, then A = C, e.g.
• Words of wisdom
• 'Love thy neighbor' is one
• Accepted rule
• Saw
• It goes without saying
• 'Too many cooks spoil the broth,' e.g.
• 'If it ain't broke, don't fix it,' e.g.
• 'Waste not, want not,' e.g.
• Saying
• It's a given
• Self-evident truth