What is gone is gone!
And don’t cling to the present, because that is also going and soon it will be past. don’t cling to the future- hopes, imaginations, plans for tomorrow- because tomorrow will become yesterday. Everything is going to become yesterday.
Everything is going to go out of your hands. Clinging will simply create misery.
You will have to let go. You cannot manage to prevent the process of things moving out of your sight, so it is better to just watch, just to witness and let things be wherever they want.