The best way to learn mathematics is to do mathematics.
当微妙的心智通过大脑和感官向外时,粗糙的名称和形式就出现了;当它停留在心中时,名称和形式就消失了。
"The soul becomes dyed with the color of its thoughts."
文章的奇特之处,如同风云变幻,不可捉摸。