I saw a wonderful video (TED talks) presented by Dr Hans Rosling. Dr Rosling is well known for his unique approach to data visualization. I highly recommend this video.
While it certainly is educational in its core area of poverty, what was truly inspiring to me was how it made me question my assumptions.
At one point in the video Dr Rosling says the challenge he was facing with his students was not "ignorance" but rather "prejudice". This truth applies irrespective of what you do in your life.
Watch this video, it is worth your time :-)