In the allegory of the cave, Plato views the sunlight as the truth, and the shadows in the cave as being false, and his contribution to the question "how can we tell what is true, and what is false" is that we have no way of knowing what is true, and what is false, until we have experienced them both, and can compare the two. I think that Plato is trying to say that society is ignorant of the truth, and prefers to look at the shadows on the wall, and we must try to break the bonds of those around us in order to see the truth of sunlight and the real world.
I think that Hobbes believes that all life, even spiritual,