The unconscious spirit is the supposed part of the human spirit or soul that operates outside of conscious awareness.

In general, the idea of the unconscious spirit suggests that there are deeper aspects of our selves that are not readily accessible to conscious awareness, but which may hold important insights, wisdom, and creative potential. It invites us to explore the depths of our inner world and connect with the spiritual dimensions of our being.

This idea has been explored in various spiritual and philosophical traditions throughout history. In some religious traditions, the unconscious spirit may be seen as the source of divine inspiration or guidance.

In Western religions, the concept of the Holy Spirit in Christianity and the Ruach in Judaism are sometimes seen as corresponding to the idea of the unconscious spirit. Both of these concepts refer to a divine presence or energy that animates the universe and is accessible to human beings through prayer, meditation, and other spiritual practices.

As a promoter of reflective consciousness, Saint Augustine, a theologian of the 5th century and Church Father, is the initiator of an introspective approach which consists in discerning the zones of unconscious from which consciousness itself is born. This discernment is achieved through a deepening of the immediate consciousness, in which the soul directly grasps its concrete reality. For Augustine, our conscious mind and our voluntary action had their common source in an inner and unconscious spiritual reality where God himself resided and which he alone knew in all its extent, and animated.

In philosophy, the notion of an unconscious spirit emerged in the course of history in the context of philosophical romanticism and its mystical and neoplatonic sources. The term itself, first used as an adjective in the 18th century, did not really appear in its present noun form until the 19th century. It was coined by the German Romantic philosopher Friedrich Schelling (in his System of Transcendental Idealism), and later introduced into English by the poet and essayist Samuel Taylor Coleridge (in his Biographia Literaria).

Friedrich Schelling was a German philosopher who was a major figure in the development of German Idealism and Romanticism. His understanding of the unconscious was influenced by his belief in the interconnectedness of all things in nature. In his philosophy of nature, he posited that nature itself was an unconscious, spiritual force. Schelling believed that the universe was not simply a collection of inert matter, but rather a dynamic, living entity that was infused with a kind of divine intelligence.

According to Schelling, the unconscious spirit is the underlying force behind all of the phenomena of the natural world, from the movements of the planets to the growth of plants and animals. This spirit is also present within human beings, although in a more conscious form, and is responsible for the development of human consciousness and culture. He sees it as a kind of pre-rational or pre-conscious realm that underlies conscious experience. In that view, the unconscious spirit is the source of creative inspiration and intuition.