Most people have a simple route table for control of their internal energies, and when engaged with an external force, are simply dedicated to dealing with one force at a time that limits thier movements. Now lets say you set up a complicated meshed route table that can handle internal energies in multiple fashions at the same time so you now can handle dealing with ever changing dynamic external forces as well as add some of your own forces to the mix all at the same time. This is what internal aiki training can do for you by establishing new paths for routing energies that you thought were never there because you were locked down in a simple mode.
i like the network analogy. take it a bit further, when you touch another person, you establish a network link between your network cloud with the other person network cloud, so now the information can flow both way through the connection. so depends on how good you are, you can reach into the other person network and manipulate the information (read energy flow).