Others find it hard to trust medical personnel who don't seem to understand their culture.

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Feith: I don't think it's all that unusual or hard to understand.

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It's sometimes hard for people to understand that you don't miss what you've never had.

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"I don't think they've ever been made to understand how hard professional football is, " said Roeder.

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So it's hard for Americans to understand if you can't accept the reality with this is what's happening, how is there going to way forward?

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"If you don't understand where you are, it's hard to tell where you are going, " says Steve Blank, professor of entrepreneurship at University of California, Berkeley, and an investor in Startup Compass.

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He doesn't understand that pumping liquidity into banks isn't the way to prevent economic hard times or stimulate better ones.

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But it's hard to understand how you can argue that the "other side" isn't serious about decreasing future health care spending while simultaneously working toward overturning the law it passed that does just that.

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