The most important experiments are the ones that challenge what we think we know.
天下很多所谓可以做的事情,未必都是可以做的啊! 
墨子说:言论如果能够付诸行动的就可以讲;不能够付诸行动的就别多说。言论不能付诸行动的而常讲,这就是卖弄口才了。
To understand a program you must become both the machine and the program.
Transparency builds trust, and trust is the foundation of progress.