The best way to learn mathematics is to do mathematics.
"Das Leben ist ein Buch, und jeder Tag ist eine neue Seite."
A penny earned is a penny saved.
"Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding."
The power is in the balance: we are our injuries, as much as we are our successes.
短期融资市场是现代金融的阿喀琉斯之踵。