最深的伤口往往是肉眼看不见的。
The deepest wounds are often invisible to the naked eye.
We are here to add what we can you to life，not to get what we can from it.
Success is nice, but the real reward is in the doing.
"The only way to make sense out of change is to plunge into it, move with it, and join the dance."
You have to believe in yourself when no one else does.
材料的质量反映了品质的质量。