The primary cause of unhappiness is never thesituation but your thoughts about it.
不幸福的主要原因从来都不是你身处的状况，而是你对此的想法。
The man in the planning room, whose specialty under scientific management is planning ahead, invariably finds that the work can be done better and more economically by a subdivision of the labor.
Water is the source of life and the force of destruction.