数学的真正力量不在于它的复杂性，而在于它的简洁和优雅。
The true power of mathematics is not in its complexity, but in its simplicity and elegance.
You can't connect the dots looking forward; you can only connect them looking backwards.
写作是对时间侵蚀的抵抗。
If you can look into the seeds of time, And say which grain will grow and which will not, speak then to me, who neither beg nor fear Your favours nor your hate.
The only limit to our realization of tomorrow will be our doubts of today.