Legendary investor Warren Buffett suggests a thought experiment.
Suppose that each of the 8 billion people on Earth are now marbles. All those marbles are placed into a massive jar.
You have a choice to put your marble in the jar or not. If you put your marble in the jar and shake the jar, you then must choose a marble and live that life instead.
Would you put your marble in the jar? If not, you live a blessed life.