悔悟是去病之药，然以改之为贵。
解析：悔悟虽好，但改正更重要。
人为什么想要只狗，我想是为了安全。当你知道这个世界上至少还有一个生物在爱着你，这会让你感到安全。
To make something good， just do it. To make something great， just re-do it， re-do it， re-do it. The secret to making fine things is in remaking them.
幸福存在于内心。
The beauty of mathematics is that it is eternal, it doesn't change.
