The only limit to our realization of tomorrow will be our doubts of today.
Quality is not a promise; it is a delivery.
学习之道，没有什么比能够弄清事物的始末，来龙去脉更重要的。
The best fertilizer for any farm is the footsteps of the farmer.
Three things you need: The ability to not give up something till it works， the ability to give up something that does not work， and the trust in other people to help you distinguish between the two.