Have you ever known -- or been -- someone who keeps mulling over an issue in their mind -- going back and forth about pros and cons, options, possibilities, worries, etc.? This is a continual quest for certainty that never arrives, but often comes at the expense of sleep, health or general peace of mind. I think everyone has been guilty of such endless mental debate about one thing or another.
One way to end the internal banter is to think about your mind as a cerebral cloverleaf. You would never drive around incessantly on an interstate cloverleaf -- after a round or two you would make a decision as to where to exit, even if you did not know exactly which road was the right one. Why persist in staying on the cloverleaf in your brain?
The next time you are tempted to go round and round about an issue, think about being in a car instead. Spend about as much time going in circles in your head as you would in a vehicle on a highway exchange -- in other words, make a decision and get off the cloverleaf!