实现明天的唯一限制是我们今天的疑虑。
The only limit to our realization of tomorrow is our doubts of today.
是非每天都会有,不去听自然也就消失了。
The capacity of the human mind for forming and manipulating symbols is what sets us apart from other animals.
译文:听取多方面的意见才能明辨是非,只听信一方面的话就会分不清是非。