4049. There were certain spirits overhead, slightly to the front, who spoke to me. They spoke in a manner that was pleasant, and flowed in quite gently. They were different from others in that an unceasing longing and desire existed with them to enter heaven. I was told that those spirits are such as correlate with the ventricles or cava majora of the brain and who belong to that province. The reason was also added that the nature of the better kind of lymphatic secretion within that province is such that it flows back into the brain, to which it therefore possesses the endeavour to go. The brain is heaven, and this endeavour is that longing and desire. Such is the nature of these correspondences.