The past is not a straight line but a tangled web.

诚信是企业立足的根本，失去诚信就失去一切。

Not knowing is probably the best.

心理学必须关注意识的实用性。

"The stage is where I feel most alive."

The use of a program to prove the 4-color theorem will not change mathematics - it merely demonstrates that the theorem, a challenge for a century, is a finite problem.