Everything是句子的主语,后跟的that is related to someone 是修饰everything的定语从句. reveals是谓语动词.part of his personality是宾语. and 引导并列句. 从by gaining ...一直到topics是方式状语,意思是“通过获得一点雨心理学相关的知识” you willbe able to use the same eyes 是主句部分.后面的"that...before"是定语从句,修饰eyes. 定语从句中的what you have never seen before是动词see的宾语从句.