If you're a thinking person, the liver is interesting, but nothing is more intriguing than the brain.
Think about what artists, novelists and poets have in common: the ability to engage in metaphorical thinking, linking seemingly unrelated ideas, such as, 'It is the east, and Juliet is the Sun.'
People think of art and science as being fundamentally opposed to each other, because art is about celebrating individual human creativity, and science is about discovering general principles, not about individual people. But in fact, the two have a lot in common, and the creative spirit is similar in both.
We are not angels, we are merely sophisticated apes. Yet we feel like angels trapped inside the bodies of beasts, craving transcendence and all the time trying to spread our wings and fly off, and it's really a very odd predicament to be in, if you think about it.
Great art allows you to transcend your mortal frame and to reach for the stars. I think great science does the same thing.
What do we mean by "knowledge" or "understanding"? And how do billions of neurons achieve them? These are complete mysteries. Admittedly, cognitive neuroscientists are still very vague about the exact meaning of words like "understand," "think," and indeed the word "meaning" itself.
Indeed, the line between perceiving and hallucinating is not as crisp as we like to think. In a sense, when we look at the world, we are hallucinating all the time. One could almost regard perception as the act of choosing the one hallucination that best fits the incoming data.