-The judgments have the power to destroy a person. However they cannot totally destroy him.
-A person on the other hand has the ability to completely destroy another man.
-Therefore when a person comes and starts an argument on his friend, all judgments leave him, for they would rather he be damaged by a person who can cause complete destruction.
-Sometimes a righteous person will cause controversy on a fellow Tzadik to remove the judgements from him.

(Likutay Maharan 241)