011 – Elul 11 – Igeres Hakodesh, Chapter 12 – י"א אלול – אגרת הקודש פרק י"ב

From Tanya - regular year - Rabbi Chaim Wolosow by R Chaim Wolosow.

This letter explains how tzedakah — whether given as a simple deed or as genuine avodah — arouses a response Above that brings peace both in the upper worlds and below. The complete separation of good from evil belongs to the time to come; meanwhile, sustained giving gradually refines the evil within a person.

https://www.torahrecordings.com/tanya/regularyear/012/011