Equanimity is the last of the 4 Brahma Viharas. It holds the other three--metta, compassion/karuna, and mudita--with spaciousness and balance. Equanimity reminds us to allow for life to unfold as it will. We can let go of control, which we never had in the first place, meeting life's up and downs with balance and the possibility of a wise, skillful response.