实现明天的唯一限制将是我们今天的疑虑。
The only limit to our realization of tomorrow will be our doubts of today.
Moral Precepts are precepts of perfection.
The only way to improve is to challenge yourself against the best.
质量不是一种行为，而是一种习惯。
文章的妙处在于，一句话能说尽天下的道理，片言能概括万物的情状。