不善之人未必本恶，习以性成，遂至于斯。
译文：坏人未必天生就坏，往往是习惯成了本性(梁上君子典故)。
Every problem in mathematics is an opportunity to learn something new.
"The world is full of stories, but only a few are worth telling."
每一首歌都是我灵魂的一部分。