Dr Zoll felt that his work in the treatment of heart disease was only belatedly recognised, although he never complained in public.

ECONOMIST: Paul Zoll

All day, I kept looking up at Marcus to make sure he was OK. He never complained, and he performed his duties impeccably.

NPR: Update From Iraq: Appreciating 'The Darkness'

He knew he was dying, but he never complained.

FORBES: Entrepreneur for Life

He never complained once.

CNN: Overheard backstage at the Oscars

See, but what Barack also saw in his grandmother, he saw a woman who never complained.

WHITEHOUSE: The White House

But the thing that Barack saw, that I saw -- he saw a woman who never complained.

WHITEHOUSE: Remarks by the First Lady at a Campaign Event

But let me tell you something -- what he saw is that his grandmother never complained.

WHITEHOUSE: Remarks by the First Lady at a Campaign Event

But what he also saw was a woman that never complained -- never complained.

WHITEHOUSE: Remarks by the First Lady at a Campaign Event

Russert knew where he was coming from, and as a result never complained about his own hard work for NBC News.

CNN: Russert's passion showed in religion, family, work, sports

He saw how his dad went through chemo and radiation treatments, but never complained, never felt sorry for himself, and continued to work full-time to provide for his family.

WHITEHOUSE: First Lady Michelle Obama Speaks at West Point Graduation Banquet | The White House