Every artist dips his brush in his own soul, and paints his own nature into his pictures.
质量从来不是偶然的;它始终是智慧努力的结果。
质数就是当你把所有模式都去掉后剩下的东西。我认为质数就像生活。它们非常合乎逻辑,但你永远无法弄清楚规则,即使你花所有时间思考它们。