Those types of 'lessons' are what I think of, when I think of this one:
"The only thing...more expensive than education is ignorance."~Ben Franklin. "We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light." ~ Plato
Let me tell you a story about a man named Jed. He made this tiny ad:
Edible Landscaping With A Permaculture Twist/ Second Edition - Kickstarter