The unique feature of the integral yoga is that it is not based on speculation but it has been built and is even being built by rigorous methods of experimentation, based on the relevant accumulated knowledge of the past experiences and realizations as also on the basis of a constant thrust towards what is needed unprecedentedly for the evolutionary manifestation of the supramental consciousness and power on the earth. Sri Aurobindo's and the Mother's works testify to the long and arduous process of experimentation carried on day after day for years and decades. If we study the life and works of Sri Aurobindo and the Mother, we shall see that prior to their first meeting on 29th March 1914, both of them had a vast and laborious period of preparation. From that momentous date of the first meeting, when the Mother came from France to Pondicherry in order to meet Sri Aurobindo, they consecrated themselves entirely to the task of discovering the most effective means of meeting what seemed to be insuperable obstacles that the contemporary crisis presented. From that day, they began to prepare new conditions on the earth so that, by the process of the yoga of conscious evolution, humanity could not only survive the crisis but also arrive at the eventual fulfillment of the deepest aspirations for establishing on the earth the kingdom of mutuality, harmony and unity.
In this conscious yoga of evolution, both Sri Aurobindo