Throughout its history, the nation has been blessed to have men like Inouye -- reserved, unboastful men, whose actions show the deep reservoir of quiet honor from which they draw their strength.

CNN: Inouye: Man of courage, humanity, dignity

Their patriotism is quiet but deep.

CNN: Inaugural Address

The 2002 death of her German-born husband, Prince Claus, took a toll on her, and it was apparent how deep her reliance on the quiet man had been: she was filmed leaning heavily, almost hanging, on Prince Friso's arm as they entered the church for her spouse's funeral.

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When Susan Lewis visited a Manhattan day spa, she was all set for a deep-tissue massage and some "quiet and relaxation, " says the 42-year-old film producer in New York.

WSJ: The Ultimate Spa Treatment: Privacy

The divide, oh, the divide: I had grown up with this great border at my back, and its quiet, unerring existence had penetrated deep into my bones and brain.

NPR: Excerpt: 'The Selected Works of T.S. Spivet'

But truly passionate leaders can be quiet: passion in a leader is a deep and abiding commitment to a cause, a vision, an enterprise.

FORBES: Mother Teresa and Henry Ford: The Passionate Leader

During the lifts, the room would go completely quiet no whoops or catcalls, just the deep silence of absolute concentration.

NEWYORKER: The Strongest Man in the World

Furthermore, quiet leaders understand and embrace the value of introspection, reflection and deep learning.

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No quiet summer weekends in Iowa these days, what with the state knee-deep in candidate.

NPR: Democratic Presidential Hopefuls Debate in Iowa