The most important property of a program is whether it accomplishes the intention of its user.

最好的技术是无形的，它只是默默地发挥作用。

We are all travelers in the wilderness of this world, and the best we can find in our travels is an honest friend.

我们教授一门学科不是为了培养关于该学科的小型活图书馆，而是让学生自己学会数学思考。