It is not a lack of love，but a lack of friendship that makes unhappy marriages.

重要的是不要停止提问。好奇心有其存在的理由。

The environment is not a mosaic of stimuli, but a field of forces in which every part is dynamically related to every other part.

I am only resolved to act in that manner, which will, in my own opinion, constitute my happiness, without reference to you, or to any person so wholly unconnected with me.

机械和节省劳力的装置只有在降低制造成本时才具有价值。