Close your eyes and imagine a lemon. Not the word. The thing itself. The weight of it in your hand. The waxy resistance of the skin under your thumb. The sharp, particular smell that rises when you press your nail into the rind. The way your mouth is probably responding right now, even though there is no lemon anywhere near you. Something just happened in your brain. Something worth paying attention to. For a long time, the imagination was treated as a secondary faculty. A us
