The Third Force or The Intermediary Force
There exists another borderline force between these two that is neither entirely physical (and condensed and formed into an object) nor is it delicate enough to be called a spirit. Instead, it is an intermediate force between these two. In other words, before gases transition into becoming an object, it is a force not with the density of objects and not as delicate as the spirit, but a cross between these two. This force is called the Perispirit or astral body.