Comparison Leads to Truth and Enlightenment in Chinese / Japanese...

不比不知道一比吓一跳 is a Chinese proverb that literally means: [If one not does] not make comparisons, [one will] not know [the truth] when [one] compares, [one will be] greatly surprised.

This goes to the idea that if you do not know bad times, you cannot know what good times are.
...And...
You can not know light without experiencing darkness.

Another way to translate this would be: If you wish to be enlightened, you need to make comparisons and analyze every aspect (of a situation, issue, or problem).