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行为恭敬,待人宽厚,处事平和,心意正直,学圣贤之道,选择良友以求有益身心,改进缺点以求完满。
In science, we must be interested in things, not in persons.
Mathematics advances not by the efforts of individuals alone but through the collective work of generations.
If a doctrine is not unintelligible, it has to be vague; and if neither unintelligible nor vague, it has to be unverifiable.