EBay's billionaire founder and proponent of good works was addressing a roomful of White House Fellows in a closed-door question-and-answer session last month, hours before United States President Barrack Obama's State of the Union address, when a query stumped him:
"What do you hope to accomplish the rest of your life?"
Mr Omidyar (44) looked down, contemplatively, then fixed his eyes on the questioner.
"We live a comfortable life, but relationships are what make a life rich," he said.
Mr Omidyar, a member of the president's Commission on White House Fellowships, touched on a mix of causes that include media democracy, education and the difference between charity ("a quick solution") and philanthropy ("systemic changes to long-term problems").
The group of White House Fellows, younger men and women picked to work at the highest levels of the federal government, seemed mesmerised.
To date, Pierre and wife Pam have committed more than $1 billion to hundreds of causes through individual gifts and four organisations they created - Omidyar Network, Humanity United, HopeLab and Ulupono (Hawaiian for "doing the right thing") Initiative.
Pam Omidyar is from Hawaii. The couple have found time to fashion Civil Beat, an investigative online news organisation started in Hawaii fixed on local issues, and the forthcoming emerging leaders programme in Hawaii patterned after the White House Fellows.
"He is the new face of philanthropy," says former president Bill Clinton, who has known the Omidyars for more than a decade.
"He and Pam live and give to their core values." EBay CEO John Donahoe says: "In his quiet way, he has enormous impact on the world".
But for Mr Omidyar, Silicon Valley legend-turned-philanthropist, life can be sublime amid the charitable endeavours and good works.
He has been largely quiet for a decade, giving an occasional interview while living in relative seclusion in Hawaii.
He dropped out of sight to oversee charity after charity. Why talk now? To fill the world in on how his organisation has learned to create philanthropic teams that bring long-term change.
He also weighed in on the toxic political discourse: "It has declined dramatically, a complete failure of leadership," he said over a vegetarian dinner the night before the Q&A session.
Despite pleas from candidates, Mr Omidyar (pronounced O-mid-e-are) stopped making political donations in 2008. Instead, he works with elected Democrats and Republicans to effect change, including a project with the Obama Administration to reduce human trafficking.
"I work with officeholders, not candidates."
"I'm worried about the American Dream," said Mr Omidyar, who immigrated to the US from France in the 1970s.
"Think of the best and brightest who came here," he said, listing founders of Google (Sergey Brin, Russia) and Yahoo (Jerry Yang, Taiwan).
A self-confessed data junkie who dives into numbers and analyses them, Mr Omidyar remains vigilantly engaged at eBay.
As its chairman and largest shareholder, he attends four board meetings a year. He also chimes in when change is necessary. Mr Omidyar, a trained engineer, inspired a major move to technology in the post-Meg Whitman era, with the appointment of Mr Donahoe as CEO to replace her and the additions of chief technology officer Mark Carges and board member Marc Andreessen.
(Ms Whitman, now CEO of Hewlett-Packard, declined to be interviewed for this story.)
"He has real clarity of purpose," says Mr Donahoe, who met Mr Omidyar seven years ago when he joined eBay.
"He believes people are basically good, and [in] the power of the individual, the little guy, to have impact on a global scale." The Omidyars' brand of philanthropy, based loosely on a venture-capital firm's approach, has been a powerful agent for social change, as eBay was for commerce.
The Omidyars' financial gifts often go to charities that follow solid business plans and produce earnings streams that sustain the non-profit work.
"Think of it as a portfolio approach to doing social good," says Mike Mohr, who has been with the Omidyars since eBay went public in 1998, and who serves as strategic adviser to their philanthropic endeavours.
Microsoft co-founder Bill Gates and others consider the reclusive Mr Omidyar a seminal figure in the intersection of philanthropy and technology.
"Pierre approaches his philanthropy with an innovative and entrepreneurial spirit that we can all learn from," Mr Gates said in an email.
"Pam and Pierre have had incredible impact in financial services and provided much needed investment in global health."
Says Virgin founder Richard Branson: "Pierre is not just providing access to finance, he is also helping to create the right environment for social enterprises and new businesses to thrive".
During research on his latest book, Screw Business as Usual, it became "inspiringly clear" that Mr Omidyar "has been screwing business as usual for years."
"Pierre has been solving issues by supporting entrepreneurial organisations that are building businesses to solve problems," Branson says, citing Ushahidi, which developed crowd-sourcing technology. It's one of about a dozen fields that fall under the Omidyars' umbrella of good works.
"Philanthropy is not just about money," Mr Omidyar said.
"Money matters, but impact matters more."
It was no surprise, then, that when Warren Buffett, Bill and Melinda Gates, and others asked some of the nation's wealthiest individuals in mid-2010 to give at least half their fortunes to charity, Mr Omidyar was among the first to say yes.
Buffett also got OKs from Oracle CEO Larry Ellison, Microsoft co-founder Paul Allen and Silicon Valley venture-capital titan John Doerr.
Mr Omidyar was 31 when he became an overnight billionaire in 1998, three years after writing the code for what would become eBay.
The company went public and he became in his words, "ridiculous rich". By mid-1999, he was worth $7.8 billion.
(His estimated personal worth is $6.2 billion, ranking him the 145th-richest person in the world, as of September 2011, according to Forbes.)
Yet, he has remained an unlikely billionaire, avoiding the trappings usually associated with the ultrarich.
"It reached a point where I could not only buy any car, but literally every car," Mr Omidyar said.
"In the end, I didn't want any cars." Pam drives a minivan; Pierre, a Prius. They and their children live in a modest home in Honolulu.
Mr Omidyar had a gnawing unease about accumulating so much money so quickly and easily. While he mulled over what to do, he considered how eBay gave people a platform to become successful entrepreneurs.
Why not, he concluded, take his business concept and apply it to charitable giving?
The eBay Foundation started in June 1998, after Yahoo co-founder Jerry Yang held an outdoor event where he highlighted the importance of giving.
"Back then, there were no examples of young entrepreneurs [in philanthropy]," Mr Omidyar said.
Friends and colleagues marvel at the Omidyars' humility, generosity and intellect.
"Two of the most grounded, down-to-earth people you will ever meet," says Larry Bacow, president emeritus of Tufts.
"There is no way you can imagine the achievement and wealth they have accumulated.
For them, it's about addressing problems at their root cause, creating an engaged population."
One of the biggest beneficiaries has been Tufts, the Boston-based college where Pam, who declined to be interviewed, and Pierre met.
It has received upwards of $160 million from them. But only an endowed chair bears the Omidyar name.
"They are incredibly low-key, nice, quiet people," says Cheryl Dorsey, vice-chairwoman of the President's Commission on White House Fellowships and president of Echoing Green, a social-entrepreneurship organisation.
"They are very approachable despite the trappings of incredible success."
The softly spoken billionaire is making plenty of noise globally, a business and philanthropy contemporary says.
"As a philanthropist, Pierre is tackling the biggest problems in the world, and ... his efforts may take many years to show their full results," says former eBay president Jeff Skoll, an Oscar-nominated producer (The Help).
The Skoll Foundation, which has given more than $300 million in grants, has worked with the Omidyar Network on, among other things, Landesa, which helps small rural farmers secure land rights.
"But make no mistake, Pierre is dedicated to social change and he will, deservedly, someday be acknowledged as the Rockefeller or Carnegie of our times."
"They don't care if they get the credit," Mr Clinton says of the Omidyars.
"In the end, it is all about results."
