to truly understand how...中的to的作用

to truly understand how...中的to的作用
As he became acquainted with American politics,however,he realized you have to work hard to keep abreast of changing values to truly understand how absurdly controversial this issue has become.

可以字面理解为“以便” 介于方式与目的之前
改变价值观“以便”真正理解这个事情.
类似于I change my value to understand you better.
再问： 整句中文解释是“当他了解美国政治之后，他认识到得下很大的工夫才能一直了解不断变化着的价值观念，真正理解关于这个问题的争议是多么的荒唐可笑。” 我认为应该不对吧！