When things are bad, we take comfort in the thought that they could always get worse. And when they are, we find hope in the thought that things are so bad they have to get better.
If you or me go to the gas station to fill up our car and it costs us much more than we expected, it will zap our discretionary income. We won't have the extra money to buy that washing machine or new winter coat-all big ticket items that are important to economic growth.