数学不是观赏性运动——你必须参与其中才能欣赏它的美。
Mathematics is not a spectator sport—you have to engage with it to appreciate its beauty.
What other dungeon is so dark as one's own heart! What jailer so inexorable as one's self!
Every mathematical problem has a solution; it just takes time and creativity to find it.
预测未来的最好方式就是创造未来。
模型的目的是足够简单以便理解和使用,但又足够复杂以捕捉系统的基本特征。
伟大的书籍是从不背弃我们的朋友。
Psychology is concerned with the what and how of mental life, not the why.