What do you want to do sadhana for? The aim should not be the satisfaction of egoism: "I want to be a great yogi; I shall have so much power and with that power I shall establish myself in the world." All such thoughts must be thrown far away.
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.
If it be true that spirit is involved in Matter and apparent Nature is secret God, then the manifestation in the divine in himself and the realization of God within and without are the highest and most legitimate aim possible to man on earth.
The Truth-power must be brought down from above into that state of peace, and this higher power - Parashakti - will directly guide the vehicle - ādhāra - and transform it.
Yoga is a generic name for any discipline by which one attempts to pass out of the limits of one's ordinary mental consciousness into a greater spiritual consciousness.
In the normal play of our mind there are all sorts of perversions; hence the need to stop all these things and inculcate right thinking, right willing - in other words, Truth must be established.
After having stopped the lower activities of the mind, it must be made receptive; and, instead of weaving all kinds of empty and idle thoughts, the mind should receive intuitions from above.
To attempt social reform, educational reform, industrial expansion, the moral improvement of the race without aiming, first and foremost, at political freedom is the very height of ignorance and futility.
The spiritual path is one of falling on your face, getting up, brushing yourself off, turning and looking sheepishly at God and then taking the next step.
On the top of the head is a Chakra - Sahasradala or the thousand-petalled lotus. There is a Chakra in the middle of the forehead between the eyebrows and one in the heart-centre. The region between the navel and head constitutes the mental field. From navel downward extending till the terminus of the spinal chord, mūlādhāra, is the seat of the vital.
One can see light above the head; that indicates a consciousness outside the body. But that itself is not the Truth-Consciousness or Vijnana. But much light descending from there illumines this consciousness.