数学不是沿着一条清理干净的高速公路小心翼翼地行进，而是一次进入陌生荒野的旅程，探险者常常会迷路。
Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.
勇气是能站起来侃侃而谈。勇气也是能坐下来静静倾听。
The best revenge is success and happiness.
过去是跟随我们的影子，但也是指引我们前进的光。