This is one of the reasons why everyone who gets to know P.H. Tuan respects him. As he says, "As long as I can go to bed each night with a clear conscience, knowing that I have been honest in my dealings, then that is all that matters."
Never Ending Chains of Giving
Tuan 'loans' money to people in need. Their repayment is unique. They do not repay him. Instead, when they have gotten their lives back together, they must make a loan to someone else in need, with the same rule. No one ever pays anyone back directly, and no one has ever repaid Tuan. Instead, he has started never ending chains of giving - his small way of making the world a better place.
There is a poem that describes the kind of person P.H. Tuan is - Abou Ben Adhem by James Leigh Hunt.
Abou Ben Adhem (may his tribe increase!) Awoke one night from a deep dream of peace, And saw, within the moonlight in his room, Making it rich, and like a lily in bloom, An Angel writing in a book of gold: Exceeding peace had made Ben Adhem bold, And to the Presence in the room he said, "What writest thou?" The Vision raised its head, And with a look made of all sweet accord Answered, "The names of those who love the Lord." "And is mine one?" said Abou. "Nay, not so," Replied the Angel. Abou spoke more low, But cheerily still; and said, "I pray thee, then, Write me as one who loves his fellow men." The Angel wrote, and vanished. The next night It came again with a great wakening light, And showed the names whom love of God had blessed, And, lo! Ben Adhem's name led all the rest!