"Einstein himself in 1926 told Heisenberg it was nonsense to found a theory on observable facts alone: 'In reality the very opposite happens. It is theory which decides what we can observe.'" (p11)When my mother faced an illness that ultimately ended her life, people unwittingly asked her "how long do you have to live?" Her response was always "I've not received any papers in the mail guaranteeing tomorrow." Most people realized the same applied to them. Tomorrow is not an observable fact. Tomorrow is only a theory.
Therefore, anything could happen tomorrow. Don't let a bad day today, define tomorrow. In theory, tomorrow may be the greatest day of your life. Appreciating the endless possibilities of tomorrow will redefine the life you live today.