Wisdom: People attain wisdom in large part by remembering what happened in the past. No generation can attain wisdom without studying and remembering the past. None of those who believed in the 1960's aphorism, βNever trust anyone over thirty,β became a wise person. Without wisdom, all the good intentions in the world amount to nothing. Intending to do good without having wisdom is like intending to fly an airplane with no knowledge of airplanes or the laws of aerodynamics. Good intentions without wisdom lead to either nothing or to actual evil.