The Mission of Spiritism by Ramatís is a profound exploration of the spiritual principles and cosmic purpose behind the Spiritist movement. Transmitted through mediumship, the book seeks to clarify the role of Spiritism as a divine instrument for humanity's moral and spiritual regeneration. It examines how Spiritist philosophy unites science, religion, and philosophy under the universal laws of reincarnation, cause and effect, and spiritual evolution.

Ramatís presents Spiritism not as a new faith but as a continuation of Christ's teachings, adapted to modern understanding and planetary transition. The work discusses the influence of disincarnate intelligences on human thought, the responsibilities of mediums, and the importance of inner reform as the foundation of true spiritual progress.

With compassion and lucidity, the author reveals that the mission of Spiritism is to illuminate consciousness, dissolve dogma, and inspire fraternity among all beings. Blending esoteric insight with ethical reflection, The Mission of Spiritism stands as both a metaphysical treatise and a call to service, reminding readers that spiritual awakening begins with self-transformation and universal love.