If you are in a hurry or need the quickest possible recap we can summarise the entire book with

“ Fulfill your true needs and eliminate your false needs. ”

or with

“For a quick kick and short-term satisfaction, choose big reward and small effort. For deeper more lasting satisfaction, choose smaller reward and greater effort.”

or like this

"My miracle is When I'm hungry I eat When I'm tired I sleep ”

˜ Zen Buddhist proverb ˜