Lesson #7: Belief and seeing are both often wrong.
Lesson #8: Be prepared to reexamine your reasoning.
Lesson #9: In order to do good, you may have to engage in evil.
Lesson #10: Never say never.
Lesson #11: You can't change human nature... (Robert McNamara)

Lesson #7: Belief and seeing are both often wrong. Lesson #8: Be prepared to reexamine your reasoning. Lesson #9: In order to do good, you may have to engage in evil. Lesson #10: Never say never. Lesson #11: You can't change human nature...

Robert McNamara

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