What is demonstrated by observing contemporary life is that so few men are willing to take their lessons from the past experience of other men throughout history, that so many obdurately prefer to learn under pressure the hard way. The same foolish errors, the old pain-bringing sins are repeated monotonously and regularly. The cost of ignoring such experience is heavy. People are not teachable and their defects not corrigible by the gentle way. They will not absorb guidance from the interior sources of reflection or intuition or the exterior sources of preachment or observation.
-- Notebooks Category 13: Human Experience > Chapter 1: Situation > # 67