善恶之间的界限是可渗透的，任何人在环境的逼迫下都可能跨越它。
The line between good and evil is permeable and anyone can cross it when pushed by circumstances.
我不喜欢软弱，我喜欢坚强。
The truth is, the science of Nature has been already too long made only a work of the brain and the fancy: It is now high time that it should return to the plainness and soundness of observations on material and obvious things.
我只是个四岁的孩子，每天都在成长一些。
Scientific progress must be guided by a moral compass.