TANYA CHAPTER 32 Part Three "All My Loving" Is the Mitzvah to love others really equal to fulfilling the entire Torah?
TANYA CHAPTER 18: PART TWO “For this thing is very near to you, in your mouth and in your heart, that you may do...
Iggeret HaTeshuvah Chapter 7: Part Three http://www.chabad.org/library/tanya/tanya_cdo/aid/7940/jewish/Chapter-7.htm