Possible Clues:

• 'Good things come to those who wait,' e.g.
• Bit of wisdom
• It's accepted as true without proof
• Truism - proverb
• Obvious truth
• Man will pursue a treasure-promising sign - that's taken for granted
• Man, after a vote, accepted proposition
• It goes without saying that it's 10.10 in the morning
• Unknown isle supports a truthful statement
• Mathematical truism