Daniel Suelo, 48, has been living for nine years without taking or using any Monday in Utah, according to Details magazine.

He lives in a cave almost for three years about an hour’s walk from Moab, Utah, where he often goes to the public library to maintain his blog for free .

In the fall of 2000, Suelo, who graduated from the University of Colorado with a degree in anthropology in 1987, decided to stop taking or using money.

Money represents lack, Money represents things in the past (debt) and things in the future (credit), but money never represents what is present, Suelo writes in his blog.

He had ever taken several jobs made plenty of money and had several credit cards over the years, but he says something was missing in his life when he used money.

He said in his blog he's never gone without a meal and for seldom got sickness. It happened once, after eating a cactus he misidentified—he vomited, fell into a delirium. He thought he was dying and even wrote a note for those who would find his corpse. But later he got better.

Hardship is a good thing. We need the challenge. Our bodies need it. Our immune systems need it. My hardships are simple, right at hand—they're manageable, he says.

I'll do what creatures have been doing for millions of years for retirement, he says. Why is it sad that I die in the canyon and not in the geriatric ward well-insured? I have great faith in the power of natural selection. And one day, I will be selected out.

In his philosophy, he means to follow Jesus’ teaching in the Sermon on the Mount “freely giving and freely taking, forgiving all debts, owing nobody a thing, living and walking without guilt . . . grudge [or] judgment, he says in his blog.