The novel Le Mas Théotime is characteristic of Henri Bosco’s style marked by a syncretic mysticism mixing Pagan and Christian symbols. The pastoral writing illustrates a deep struggle between unknown drives. The hypothesis of this article is that these spiritual forces are linked to old alliances between families. To some extent, the pastoral narrative activates ethnic links between characters that are not always conscious about the power of these relations. By referring to the dream analysis proposed by Carl Gustav Jung, it is possible to read the pastoral in Le Mas Théotime as an ancestral tragedy where old alliances can be betrayed and questioned.