Profitability and sustainability must go hand in hand—there is no other way forward.
价格是你付出的，而价值才是你得到的。
The most important property of a program is whether it accomplishes the intention of its user.
The fountain of content must spring up in the mind, and they who have so little knowledge of human nature as to seek happiness by changing anything but their own dispositions will waste their lives in fruitless efforts.
Always stay curious. The moment you stop learning is the moment you stop growing.