Sri Aurobindo
Letters of Sri Aurobindo
03. The Triple Transformation: Psychic – Spiritual – Supramental
If the peace once becomes stable, there is no farther assimilation 
needed for that, as that means the whole system is sufficiently prepared to receive and absorb continuously. There may be periods of assimilation necessary for other things, but these periods need not interrupt the inner status. For instance if Force or Ananda or Knowledge begin to descend from above, there might be interruptions and probably would be, the system not being able to absorb in continuous flow, but the peace would remain in the inner being. Or there might even be something like periods of struggle on the surface, but the inner being would remain calm and still watching and undisturbed and, if there is knowledge established within, understanding the action. Only for that the whole being vital, physical, material must have become open and receptive to the peace. Peace would then go on perhaps deepening and becoming wider and wider, but periods of interruption and assimilation would not be needed.