Perhaps Eric's gratitude made people feel better, or at least less bad? Or perhaps saying thanks boosted the helper's self-esteem, which in turn motivated them to help again.

或许是Eric的感谢信让人有优越感或至少不是没道德的，也或许说“谢谢”能提高帮助者的自尊，从而使他们更有动力再次帮助别人。

youdao

PsyBlog has gone gratitude-mad this week, what with reporting experimental evidence that practicing gratitude can increase happiness by 25% and reviewing 'thanks', the book by the study's author.

本周是PsyBlog的疯狂感恩周，因为研究报告的作者称，实验表明经常心怀感恩和口念“感谢”能够增加25%的幸福。

youdao

We wish to show our gratitude and thanks with a small gift.

我们送您一件小礼物，以表我们对您的感激之情。

youdao

You deserve not only our thanks and our gratitude, but you deserve our support.

WHITEHOUSE: The White House

"Don't expect thanks or appreciation or gratitude, none of that, " Feinberg said.

WSJ: Overseer of US victim funds says work wrenching

The President believes, and I think all of us believe, that the very least we can do is show our gratitude and thanks to somebody that served our country so admirably.

WHITEHOUSE: Press Briefing