我们实现明天的唯一限制将是我们今天的怀疑。
The only limit to our realization of tomorrow will be our doubts of today.
宇宙中唯有两件事物是无限的:那就是宇宙的大小与人的愚蠢。而宇宙的大小我却不能肯定。
The quality of an organization's systems determines the quality of its processes.