"Renouncing the honors at which the world aims, I desire only to know the truth... and to the maximum of power, I exhort all other men to do the same."

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You cannot show real respect to your parents by perpetuating their errors.... Do you consider that the inventor of a steel plow cast a slur upon his father who scratched the ground with a wooden one? I do not consider that an invention by the son is a slander upon the father; I regard each invention simply as an improvement; and every father should be exceedingly proud of an ingenious son. If Mr. Talmage has a son, it will be impossible for him to honor his father except by differing with him.

— Robert Green Ingersoll