At times we meet someone new and feel distant, disconnected, or disgusted. Although we don't want to believe it, and it's not easy or desirable to look further, it can be a great learning lesson to figure out what part of the person is being reflected in you. It’s simply just another way to create more self-awareness.

这个句子中出现了四个it。第二和第三个it是形式主语，其后的不定式短语为真正的主语。这没有什么特殊。第四个it为人称代词，指代前面一句话的内容：即it can be a great learning lesson to figure out what part of the person is being reflected in you这句话。注意最后一句中的不定式to create...不是真正主语，而是名词way的定语。这个句子中用法比较特殊的是第一个it，它用在让步状语从句中，指代后面主句的内容：it can be a great learning lesson to figure out what part of the person is being reflected in you.

类似的用法如下：

You won't believe it! Tom has won the first prize---a brand new car.

Although you may not believe it, Tom has won a brand new car.

以上两个句子中，it都是指代后面句子的内容。代词的这种用法叫做前照应（cataphoric reference). 第四个it指代前面句子的内容，这种用法叫代词的后照应（anaphoric reference).前照应不如后照应常用。