真正的可持续性意味着为子孙后代留下比我们发现时更好的土地。
True sustainability means leaving the land better than we found it for future generations.
理论实践确实是其自身的标准，并且包含明确的协议以验证其产品的质量。
The best technologies fail without the right people to implement them.
The greatest happiness of life is the conviction that we are loved; loved for ourselves, or rather, loved in spite of ourselves.
The ruling class has the means of material production at its disposal; the proletariat has nothing but their labor power.
人是自己幸福的工匠。
Our frustration is greater when we have much and want more than when we have nothing and want some. We are less dissatisfied when we lack many things than when we seem to lack but one thing.