Now that I am older,I believe that is a proper standard by which to judge people,even though I still don't know precisel

问题描述:

Now that I am older,I believe that is a proper standard by which to judge people,even though I still don't know precisely what a good heart is.中which to judge是怎么回事,省略了什么?

不是省略.which 指的是standard.
a standard by which to judge.一个标准,通过它来判断