最大的幸福是知道不幸的根源。
The greatest happiness is to know the source of unhappiness.
Science is not just about theory; it's about making things that work in the real world.
Be yourself; everyone else is already taken.
解析:经常反省检查自己,不给私欲留空间。
世界上最好和最美丽的东西是看不见甚至摸不着的——它们必须用心去感受。
Happiness comes from inner peace.