Bob Gates on Hillary Clinton in his book "Duty"

My experience working with Hillary illustrated, once again, that you are never too old to learn a lesson in life. Before she joined the Obama administration, I had not known her personally, and what views I had were shaped almost entirely by what I had read in the newspapers and seen on television. I quickly learned I had been badly misinformed. I found her smart, idealistic, but pragmatic, tough-minded, indefatigable, funny, a very valuable colleage, and a superb representative of the United States all over the world. I promised myself I would try to never again form a strong opinion about someone I did not know.