Love is a double experience of two beings who participate in it. "The original and primordial fire, sexuality, raises the red flame of eroticism (imagination/intellect), and this in turn sustains the other blue and tremulous flame, that of love. Eroticism and love: the double flame of life" (p. 7). However, between the physical and spiritual attraction of two beings who love each other, there is the search for reciprocity, and it is also irremediably subject to time, accidents: changes such as falling out of love, illness, and death. "All love, even the happiest, is tragic" (p. 111).
The essay also details the literature and poetry of love and finally the philosophical theories that have explored the origin of life. In the last part of the book, Octavio Paz reflects on religion and scientific knowledge: the Big-Bang theory, black holes, artificial intelligence, and neurological construction (Edelman and Sacks). He also talks about dehumanization, materialism, the evils (political - tyranny -, economic, moral, and spiritual) that afflict modern society. Perhaps an invitation to continue reflecting on what it means to be a "human person" and its future, and to include the idea of love as a positive, salvific, and vindicating source of humanity.