All courtesy of Robert Heinlein ...
“Your enemy is never a villain in his own eyes ...”
“Don’t handicap your children by making their lives easy.”
“Never underestimate the power of human stupidity.”
Heinlein provided us with many, many more.
“A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.”
― Robert A. Heinlein