Count not what is lost, but what is left. If you are ruing that the cup is now only half-filled, how can you possibly enjoy the half that remains? That which is gone cannot be retrieved. Water that has passed under the bridge on its way to the sea, does not return. The man who mourns the passing of the morning cannot appreciate the afternoon or evening. Those who live in the past cannot thrive in the present or future. Stop looking behind you and start looking around you. Stay in the real and practice mindfulness.