We’ve all heard it before: money doesn’t buy happiness — and investing legend Warren Buffett took that sentiment one step further.

“When you get to my age, you will not measure how well you’ve done with how much money you’ve got, I can guarantee you that,” he once said in a speech to students at Georgia Tech. “The money isn’t going to be that big a deal.”

Buffett is the 10th richest person in the world — behind Elon Musk, Jeff Bezos, and Bill Gates, among others — with an estimated net worth of $135 billion, according to the Bloomberg Billionaires Index.

The Berkshire Hathaway CEO became a millionaire while still in his early-30s and a billionaire by his 50s. He’s now almost 94 years old and offers a unique perspective on wealth and success — one that includes living a simple, frugal life.

Here’s a closer look at the Oracle of Omaha’s method of tracking success.

How to measure your success

Buffett believes that, beyond a certain level of wealth, people’s lifestyles and experiences aren’t actually all that different.

“Think about it, seven hours a day you are in bed,” he told the Georgia Tech students. “You’ve got the exact same mattress I’ve got. So, we are on a parity. I can’t outdo you in terms of my sleeping enjoyment… We eat at the same places… We dress more or less the same.”

Life’s basic necessities and interests, according to Buffett, aren’t much different for those with modest means and those with immense wealth.

Considering he was speaking to a congregation of college students, he said their energy and education already made it likely they’ll make good moneydown the road, so that shouldn’t be the primary yardstick for gauging success in their lives.

Instead, Buffett prefers a more sentimental measure: “You’ll measure [wealth] by how many [people] really love you in the end. You can’t buy love.”

Research appears to back this up. A studypublished in the Healthcare (Basel) Journal showed that increased social interactions and frequent gatherings with family improved the overall life satisfaction of older adults.

On the flip side, social support and frequent interactions with other people were not the only factors determining life satisfaction. Another studypublished in the Journal of Advanced Nursing found that poverty had negative mental health impacts on elderly people as they struggled to meet their basic needs.

Simply put, Buffett is correct in that money isn’t everything; however, it’s still a vital ingredient for a long, fulfilling life. With that in mind, investing and building wealth is actually an important goal.

Moneywise