As the evolutionary development takes place to move humanity beyond the infrarational stage, the activity of the rational intellect, or the suprarational spirit begins to infiltrate and influence the infrarational vital energy of the society. There can be a movement of broader intellectual action that disseminates the insights of the deep thinkers, or there can be a broader development of spiritual purpose, albeit still confused and obscured by the vital basis upon which it is asked to build.
Sri Aurobindo observes: “The mystics become the sowers of the seed of an immense spiritual development in which whole classes of society and even men from all classes seek the light, as happened in India in the age of the Upanishads. The solitary individual thinkers are replaced by a great number of writers, poets, thinkers, rhetoricians, sophists, scientific inquirers, who pour out a profuse flood of acute speculation and inquiry stimulating the thought-habit and creating even in the mass a generalised activity of the intelligence, — as happened in Greece in the age of the sophists. The spiritual development, arising uncurbed by reason in an infrarational society, has often a tendency to outrun at first the rational and intellectual movement. For the greatest illuminating force of the infrarational man, as he develops, is an inferior intuition, an instinctively intuitional sight arising out of the force of life in him, and the transition from this to an intensity of inner life and the growth of a deeper spiritual intuition which outleaps the intellect and seems to dispense with it, is an easy passage in the individual man. But for humanity at large this movement cannot last; the mind and intellect must develop to their fullness so that the spirituality of the race may rise securely upward upon a broad basis of the developed lower nature in man, the intelligent mental being. Therefore we see that the reason in its growth either does away with the distinct spiritual tendency for a time, as in ancient Greece, or accepts it but spins out around its first data and activities a vast web of the workings of the intelligence, so that, as in India, the early mystic seer is replaced by the philosopher-mystic, the religious thinker and even the philosopher pure and simple.”
Sri Aurobindo, The Human Cycle: The Psychology of Social Development, Chapter 18, The Infrarational Age of the Cycle, pp. 187-188