The Planets Within centers on one of the most psychologically oriented movements of the prescientific age. In Renaissance Italy, a group of inner Columbuses charted new territories that today still give us a much-needed sense of who we are and where we have come from. Chief among these masters of the interior life was Marsilio Ficino, presiding genius of the Florentine Academy, who taught that all things exist in soul and must live in its light. This study of Ficino broadens and deepens our understanding of psyche, for Ficino was a doctor of soul, and his insights teach us the care and nurture of soul.