whatever part of the $1,440 you failed to use during the day would be erased from your account, and no balance would be carried over. What would you do? You’d draw out every cent every day and use it to your best advantage. Well, you do have such a bank, and its name is time. Every morning, this bank credits you with 1,440 minutes. And it writes off as forever lost whatever portion you have failed to invest to good purpose.