1 . Time and money are life’s most valuable resources. One of the great laws of economics is that time equals money. The phrase “time is money” is usually credited to Benjamin Franklin, who used it in an essay(Advice to a Young Tradesman,1748).     1     He encouraged people to treat time like money. However, most people think about time and money in vastly different ways.

    2     Poor or rich, we all have 24 hours a day, 7 days a week. Thus, each of us faces the choice of how to spend our time. In a world of scarcity, choosing one thing means not being able to do something else.

The value of time varies from person to person. Time is relatively scarce (缺乏的) for people with higher incomes, partly because their time is more valuable. So, to have lots of time, rich people hire other people to do their housework.     3    

Time cannot be stored. One of the reasons we give little thought about how we use our limited resources is that we can’t save time.     4     You can’t bottle time and exchange it for an object or event. However, when people are made aware of their mortality (生命的有限), they wonder if they did make the most of their lives.

In sum, time is anything but free. As a non-renewable resource, time is quite expensive.     5     Do we want to spend these precious moments on social media or spend that time learning something new? Skills and knowledge take time so the more time you spend on them, the more you improve.