The best way to learn mathematics is to do mathematics.
Quality is not a label; it is a standard.
"The writer is a man who is always trying to find the truth, the truth about himself, the truth about the world, the truth about life."
用扭曲的人性之材，造不出完全笔直的东西。
母亲的心是一个深渊，在它的最深处你总会得到宽恕。