TANYA CHAPTER 18: PART ONE http://www.chabad.org/library/tanya/tanya_cdo/aid/7897/jewish/Chapter-18.htm
Tanya Chapter 24 Part Five: "Stupid Is As Stupid Does” Recognizing the source of all sin and inappropriateness enables us to live righteously.
TANYA CHAPTER 31 Part Ten "Joy for Every Body II" Maintaining happiness; protecting soul joy from bodily frustration.