One must be on guard against the ego. He should test his actions by their motives; let him ask himself whether his teacher would act in the same way. Seeking guidance should be combined with the active use of his own reason about any matter, because the highest reason coincides with the highest guidance. In financial matters, especially, he should make reason the touchstone.
-- Notebooks Category 13: Human Experience > Chapter 2: Living in The World > # 232