这一章要说的原则大部分来源于常识，他们涉及到我们天生的怀疑、判断、自由思考、质问和理解能力的锻炼。
The principles presented in this chapter stem mostly from common sense; they involve the exercise of our inherent capacity for skepticism, judgment, free thinking, questioning and understanding.
这一章要说的原则大部分来源于常识，他们涉及到我们天生的怀疑、判断、自由思考、质问和理解能力的锻炼。
The principles presented in this chapter stem mostly from common sense; they involve the exercise of our inherent capacity for skepticism, judgment, free thinking, questioning and understanding.
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