"Reason, the Only Oracle of Man; Or, A Compendius System of Natural Religion" by Col. Ethan Allen is a philosophical treatise written in the mid-19th century. This work delves into the principles of natural religion, emphasizing the importance of reason and morality over superstition and dogma. The author explores the concept of God, the moral obligations of humanity, and critiques traditional religious beliefs, proposing a rational foundation for understanding spirituality. At the start of the treatise, Allen introduces himself and contextualizes the difficult journey this work faced prior to its publication due to its unorthodox views on religion. He insists on the necessity of reason in understanding God and moral governance, asserting that ignorance and superstition have long clouded humanity’s comprehension of the divine. The opening outlines Allen's view that awareness of God arises from natural inquiry, philosophical exploration, and a desire for moral rectitude, setting the stage for a deep exploration of humanity's relationship with the divine and the bodily expressions of faith. (This is an automatically generated summary.)