Only someone who understands something completely can explain it so that no one else can understand it. Good judgment comes from experience. Experience comes from bad judgment. The most heavily traveled streets spend the most time under construction. Every solution breeds new and bigger problems.
Nature always sides with the hidden flaw.
Nothing looks as good close-up as it does from far away. In any given set of circumstances, the correct course of action is dictated by subsequent events. The only imperfect thing in nature is the human race. Good times end too quickly. Bad times go on forever.