Reply To: Question of an ignorant, closed-minded Lubavitcher

2cents,

Very important and worthy question about method of knowing.

could you specify the source indicating that tzadikim no longer possess a yetzer harah?

Tanya. Perek Yud, etc.

The Alter Rebbe bases this on several psukim and Maamarei Razal.
לבי חלל בקרבי
ובערת הרע מקרבך
צדיקים יצר טוב שופטן
Etc.

In tzaddik itself, there are many levels. Tzaddik gramur, tzaddik eino gamur. In the latter are countless levels.