I try to treat all the money I'm making like it's the last time I'm going to make it.

My favorite things in life don't cost any money. It's really clear that the most precious resource we all have is time.

Time and money are largely interchangeable terms.

Each piece of money is a mere coin, or means of circulation, only so long as it actually circulates.

Although gold and silver are not by nature money, money is by nature gold and silver.

Exchange value forms the substance of money, and exchange value is wealth.