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在数学中,真理总是相对于你所在的系统而言的。
In mathematics, truth is always relative to the system you're working in.
People, even more than things, have to be restored, renewed, revived, reclaimed, and redeemed;never throw out anyone.
The freedom then of man, and liberty of acting according to his own will, is grounded on his having reason, which is able to instruct him in that law he is to govern himself by, and make him know how far he is left to the freedom of his own will.
心理学的真理是经得起生活考验的东西。