Love Your Fellow Jew
The advice in the previous chapter, that of redefining our self image as soul-centered rather than body centered, is also the way to fulfill the commandment "Love your fellow as yourself." Only our bodies divide us; our souls are one.
(Significantly, the number 32 in Hebrew is ל"ב which also spells the word "lev" meaning "heart." This reminds us that ahavas Yisrael is the "heart of Tanya.")