Dr Pete writes snipped: Different "levels" of practice: Gross, subtle and unmanifest. Gross is the actual behavioral asana with the body or changing the behavioral breathing of the lungs. Subtle is the change in the various koshas (subtle bodies) from the behavior, and unmanifest is the virtual "structure" or unexpressed/unmanifest "seed" of the asana or pranayama in pure consciousness. This last point is very difficult to express. Every "thing" in the manifest, time/space world is a virtual, unmanifest "structure" in consciousness.
Tom T: Think of the unmanifest level as the code for your and all DNA. The code is in the unmanifest and when the code pops into the relative it begins to run and creates the DNA. From the Upanishads. There is no difference between your DNA and the DNA of all creation. Great piece of software.Tom