[...] two young fish who encounter an older fish swimming the opposite way. He nods at them and says, « Morning, boys, how’s the water? » — which prompts one of the young fish to ask the other, « What the hell is water? » When you are in and of a culture—as fish are in and of water— it is often difficult or even impossible to see that culture. Often people who have spent their lives living in one culture see only regional and individual differences and therefore conclude, « My national culture does not have a clear character ».