Machshava:

Ethics 

Collections: Rabbi Weinberger: Tanya

Description

P. 294 in the commentary (7th perek).In forbidden relationships, the klipah directly absorbs the kedusha. The mekabel (receiver) and the mashpiah (giver) have to both want to receive/give in order for the relationship to exist. When we're dealing with forbidden relationships, there is a factor of hiskashrus (connecting, attaching) that follows a person throughout their life, and he cannot walk away from it. Lost seed becomes enclothed in the klipah, not fully absorbed. A final review of the entire perek, about redeeming lost kedusha from the klipos.