Evolution is not finished; reason is not the last word nor the reasoning animal the supreme figure of Nature. As man emerged out of the animal, so out of man the superman emerges.
The human mind moves always forward, alters its viewpoint and enlarges its thought substance, and the effect of these changes is to render past systems of thinking obsolete or, when they are preserved, to extend, to modify and subtly or visibly to alter their value.
The Atheist is God playing at hide and seek with Himself; but is the Theist any other? Well, perhaps; for he has seen the shadow of God and clutched at it.
Delight is the secret. Learn of pure delight and thou shalt learn of God. What then was the commencement of the whole matter? Existence that multiplied itself for sheer delight of being and plunged into numberless trillions of forms so that it might find itself innumerably.
Thus to act under the guidance coming from above, this is one side of the sadhana, the dynamic side. The other one is the discrimination between the Purusha and the Prakriti. The Purusha will calmly observe, give sanction, choose, but will realise that all this does not belong to him - all these are outside him. This is the static side of the sadhana. These two aspects constitute the basis of Yoga.
For the powers of our mind, life, and body are bound to their own limitations, and however high they may rise or however widely expand, they cannot rise beyond them. But still, mental man can open to what is beyond him and call down a Supramental Light, Truth, and Power to work in him and do what the mind cannot do. If mind cannot by effort become what is beyond mind, Supermind can descend and transform mind into its own substance.