The Guardian newspaper of London had an interesting article where they asked 250 scientists "what is the one thing everyone should learn about science?"
Most of the scientists said it was something in their field. I guess you have to think that your work is the most important aspect of reality. I was surprised that many of them went back to the Greeks to get their lessons. Personally I think that the most important lesson about science is the fact that all learning stems from observation. Everything in the universe can be learned just by being aware of the world around you.