帮忙说明“that”所修饰的成分：“But the fact of the matter is.”

But the fact of the matter(主语） is（系动词） that【1】（表语从句的引导词） there's not one person that【2】（定语从句的引导词,先行词是person) I know that【3】（同上） you trust enough to let close enough that（结果状语从句的引导词） they could hurt you.
PS：系动词后that引导句子是表从作表语,表从里又含有修饰one person的两个定从,而第二个定从又含有一个修饰它本身的状语从句.
PS：好BT的句子!~