I read the following on another site and thought it was a great analogy. I made a few changes but for the most part is as I found it
Imagine there is a bank that credits your account each morning with $86,400. The only catch is that it doesn’t carry over a balance from day to day. Every evening the bank deletes whatever part of the balance you failed to use during the day. What would you do? Draw out every cent, of course. Well each of us has such a bank. It’s name is time. Every morning it credits you with 86,400 seconds. Every night it writes off as a lost whatever of this you have failed to invest to a good purpose. It carries over no balance. It allows no overdraft. If you fail to truly use the day’s deposits, the loss is yours. There is no drawing against “tomorrow”. You must live in the present on today’s deposits. Invest it so as to get from it the utmost in health, happiness and success. The clock is running. Make the most of today.