The art of letting go is the hardest thing to muster. Letting go of that money you no longer have, of your high-school sweetheart or former partner, of your dead loved ones, of your misconceptions from last year. You cannot be wrong again in a forward-moving way unless you let go. You can only be wrong in your normal, static, unproductive, unaesthetic fashion.
The art of letting go is the easiest thing to muster. Just let go.