There are two days in every week about which we should not worry. Two days which should be kept free from fear and apprehension. One of these days is yesterday, with its mistakes and cares, its faults and blunders, its aches and pains. Yesterday has passed forever beyond our control. All the money in the world cannot bring back yesterday. We cannot undo a single act we performed. We cannot erase a single word we said. Yesterday is gone!