No, he does not refer to Sri Aurobindo or the Mother's "past lives". His book is more like a philosophical exposition of the subject, but also aimed at giving certain practical attitude pointers relevant to the sadhana. Re. knowledge of past lives as a form of knowledge by identity, Mother suggests that this would constitute a part of total knowledge. They have spoken here and there about their own past lives, but did not make too much of it, since it is likely to be romanticized by people who have not arrived at the means to know these things thrmselves.