To the basis of evil:
Now you may be thinking. This quote, it's nonsense!
But this quote has to do with judging, telling the other person's story.
Let me explain.

Because we look outside ourselves-superficially at the other person's story-we don't have to look at ourselves. (although the over-judging other often serves as an over the mirror to ourselves as well).

There is also no time for focusing on ourselves, our shadows and imbalance.
Our own story is relegated to the unconscious and we tell the story of the other. A story that does not rhyme with our own, out of lack of empathy.
This is the basis of harm.

A good question to ask yourself here is: do I know my story?
Am I conscious of it, or is it tucked away in the unconscious?
Once you know your own story, judgment will quickly disappear, empathy will arise and understanding will take its place.
side-note: an opinion is substantially different from a judgment!