(一个人)在本不应结束的点上结束、舍弃了自己的努力,这样的人就什么事都可能结束放弃。对于应该厚待与重视的人,没有厚待重视而是慢(薄)待轻视,那么他对什么人、什么事都可以慢待轻蔑。这样的人,向前进行的时候锐气十足,(遇到难点)倒退下来,也会非常迅速。
Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers.
The beauty of mathematics lies in its ability to describe the universe in a language that is both precise and universal.