The world is full of people who have stopped listening to themselves or have listened only to their neighbors to learn what they ought to do, how they ought to behave, and what the values are that they should be living by.

能源效率是我们减少排放过程中默默无闻的英雄。

Your passion in life should fit you exactly； but your purpose in life should exceed you. Work for something much larger than yourself.

The only limit to our realization of tomorrow will be our doubts of today.