What guidance does Chapter 12 provide regarding social duties and caste?

Chapter 12 offers specific advice on social and religious conduct. It cautions against two extremes: the "chaos of mixing castes" and the "pretense of caste pride." This suggests a path of moderation. Furthermore, the chapter advises one to not "become negligent of the duties of your class and stage of life," which is referred to as Varnashram Dharma. The overall message presented in Chapter 12 is to fulfill one's prescribed social and religious roles diligently but without the arrogance or pride that can accompany them, always keeping the path of devotion as the primary focus.