在商业中，如果你不前进，你就在落后。
一本书就是装在口袋里的花园。
You never fail until you stop trying.
To every action there is always opposed an equal reaction； or， the mutual actions of two bodies upon each other are always equal， and directed to contrary parts.
Literature is the memory of humanity, a bridge between past and future.
A method of solution is perfect if we can foresee from the start, and even prove, that following that method we shall attain our aim.
进步的最大障碍不是无知，而是知识的幻觉。