Wikipedia
General revelation
In theology, general revelation, or natural revelation, refers to knowledge about God and spiritual matters, discovered through natural means, such as observation of nature (the physical universe), philosophy and reasoning. Christian theologians use the term to describe knowledge of God purported to be plainly available to all humankind. General revelation is usually understood to pertain to outward temporal events that are experienced within the world or the physical universe. The definition may be extended to include human conscience or providence or providential history.