Related Clues:

• Accepted postulate
• Statement accepted as true
• 'Lost time is never found again,' e.g.
• ''What goes up must come down,'' e.g.
• Universally accepted principle
• It's assumed
• Protocol
• 'Power corrupts,' e.g.
• Geometry postulate
• "If it ain't broke, don't fix it," e.g.
• Red-underlined book heading
• "Good things come to those who wait," e.g.
• Universal principle
• "Lost time is never found again," for one
• Generally accepted truism