"Except for blending with the void
There is no way to understand The Way of Aiki."
- O Sensei
What might he have been talking about or referring to?
When the blending of the movements, directions and energies of tori and nage coincide perfectly so that when nage gets up off of the ground and thinks, "What happened, I did not feel tori throw me, I felt nothing!' and tori thinks, " What happened, I did not feel nage resist me, I felt nothin!.".