All unhappiness (when there is no immediate cause for sorrow) comes from excessive concentration on the past or from extreme preoccupation with the future.
— Fulton J. Sheen, Lift Up Your HeartAll unhappiness (when there is no immediate cause for sorrow) comes from excessive concentration on the past or from extreme preoccupation with the future.
— Fulton J. Sheen, Lift Up Your Heart