For look into a flower, and what do you see? Into the very heart of nature’s double nature—that is, the contending energies of creation and dissoluti… - Michael Pollan

Beauty and nature often shows up in the vicinity of sex—think of the plumage of birds or mating rituals through out the animal kingdom. “Sexual selection”—that is, evolution’s favoring of features that increase a plant’s or animal’s attractiveness and therefore it's reproductive success—is the best explanation we have for the otherwise senseless extravagance of feathers and flowers, maybe also sports cars and bikinis. In nature, at least, the expense of beauty is usually paid for by sex.
There may or may not be a correlation between the beautiful and the good, but there probably is one between beauty and health. (Which, I suppose, in Darwinian terms, is the good.) Evolutionary biologists believe that in many creatures beauty is a reliable indicator of health, and therefore a perfectly sensible way to choose one mate over another. Gorgeous plumage, lustrous hair, symmetrical features are “certificates of health,” as one scientist puts it, advertisements that a creature carries genes for resistance to parasites and is not otherwise under stress. A fabulous tail is a metabolic extravagance only the healthy can afford.

Aldous Huxley did his best to argue us out of the view that a chemically conditioned spiritual experience is false—and he did so long before we knew anything about cannabinoid or opioid receptor networks….He points out that mystics have always worked systematically to modify their brain chemistry, whether through fasting, self-flagellation, sleeplessness, hypnotic movement, or chanting.†
†Huxley suggests that the reason there aren’t nearly as many mystics and visionaries walking around today, as compared to the Middle Ages, is the improvement in nutrition. Vitamin deficiencies wreak havoc on brain function and probably explain a large portion of visionary experiences in the past.

Home cooking is good for you, and I eat out less. But that's the least of it. What has surprised me is how stimulating it is. How satisfying. You learn a lot about plants and animals. You begin to recognise your place in the world.