To know good and evil is not enough； one must also do them.

Sustainability isn't just a trend—it's a responsibility we owe to future generations.

The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when it be obeyed.

Sometimes the hardest battles are fought within the silence of our own hearts.

一次又一次地后悔到终身,还不如不做后悔之事而无后顾之忧。