I was just conversing with spirits and angels about reflection, to which I do not know whether people have given enough attention; and it was said that if they give it some thought, they will discover more secrets in the doctrine of reflection than in any other. What reflection achieves can be quite clear to everyone from the fact that we perceive no sensation of the body or its parts, and are unaware of having a sensation, unless we reflect upon that part of our body. Then we perceive heat, cold, pressure - we even feel what that part is suffering. If we reflect on our breathing, then we feel and know that we are breathing, and in this way a voluntary factor joins in; besides innumerable other instances.