What man actually needs is not a tensionless state but rather the striving and struggling for some goal worthy of him.
可持续性不再是一种选择，而是任何希望长期繁荣的企业的必需品。
I'm the reason your sky won't be blue.
I don't wait for inspiration. I create it.
The elegance of a proof is as important as its correctness.
The only thing I can control is my effort and my attitude.