Yesterday is gone. Forget about it. Leave it where it is: in the past. It is gone with all its pains, failures, blunders and disappointments. It's gone with all its follies, sorrows and sadness. There's nothing you can do about it. You cannot undo it like you undo certain commands in a computer device. It has happened. Let bygone be bygone.
Yesterday's gone! Let it go. Clinging to your past will only breed worry and fear, a combined instrument of destruction. Do you want to keep this destructive pair in your life? Yesterday is dead. Leave it dead. Don't scoop out its remains. Nothing happens yesterday. Everything happens today. Forget about yesterday. Forge ahead today. It's the cash you have in hand.