Every mathematical problem has a solution; it just takes time and effort to find it.
每个数学问题都有一个解决方案;只是需要时间和努力去找到它。
The future is not a result of choices among alternative paths offered by the present, but a place that is created—created first in the mind and will, created next in activity.
采草编成同心结,想要送给知音人。