Arthur C. Clarke (2001 Space Odyssey) - "Any technology, in a sufficiently advanced form, is indistinguishable from magic" (paraphrased).
PPS - "Any technology, in a sufficiently out-of-date form, is indistinguishable from an abacus?"
Serotonin is a nice chemical which can be enjoyed by eating chocolate. Exercise releases endorphins. Dopamine is another pleasant chemical.
To gain weight, eat more and exercise more. To lose weight, eat less and exercise more.
"English Boarding Schools"
In Real Life Wands