Payphone, wishing you would call me.

The greatest happiness of a teacher is to send groups of children to the other shore of their ideals.

Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

Collaboration is the foundation of progress in science—no one works alone.

释义：财富和货币应像流水一样流通，不可停滞。这句话强调财富的流动性，提醒人们要善于理财。