There is a third thing we should understand concerning this subject which is of great importance: that which stands between vacuum and substance is capacity. When we look at the sky we feel that it is a vacuum; it seems to be nothing, but in reality it is not nothing, it is capacity. Vacuum is all-knowing, but it is capacity which enables vacuum to know. And as the sky is a capacity for the vacuum to be all-knowing, so every being and every thing is a capacity, greater or lesser, which supplies a body or a vehicle for pure intelligence to work through.