Knowing is not understanding. There is a great difference between knowing and understanding: you can know a lot about something and not really understand it.
“Although there was a point with the Tijuana Brass where we were playing for such huge crowds that I kind of lost contact. At one point, the only connection I had with the audience was with people out there lighting cigarettes.”
“Moreover, the practical recommendations deduced from ecological principles threaten the vested interests of commerce; it is hardly surprising that the financial and political power created by these investments should be used sometimes to suppress environmental impact studies.”