A firm, regular, balanced and continuous flow of insight vision  in  control mind   towards the desired one pointed subject or object thought of  simple mind  is meditation. Meditation is reflection or contemplation of feeling have desired subject or object in  control mind   that continue to flow continuously and without any interruption from the flow of thought  of other subject of  simple mind . Again in meditation no spiritual knowledge of self conscious or spiritual powers of natural are gained and it is mere more  natural  tool or technique from insight vision  to attain consciousness of self conscious or its spiritual knowledge or spiritual powers of  natural  essence that are flowing in  control mind  . Perfection in insight vision  leads to meditation and as such perfection in meditation also means perfection in insight vision  but not in opposite.

insight vision  and meditation are both tools for entering in spiritual union and consciousness of spiritual knowledge and true knowledge is attained in spiritual union. As such meditation is path tool to attain spiritual union with self-conscious and attain spiritual knowledge of self conscious of soul. Meditation is different from spiritual union that is  natural  tool to enter in self conscious in  control mind  . Mastery of spiritual union means meditation but mastery of meditation does not mean perfection in spiritual union.

The main difference between meditation and spiritual union is that in meditation  control mind   remain conscious of its existence and continue uninterrupted flow of insight vision  on the desired subject or object of  simple mind . It is still bonded to concept of duality. It still feels the distinction between observer  control mind   and subject or object single thought of  simple mind  being observed. But in spiritual union that is 8^th and last step of yoga practice, the  control mind   loses its existence allowing the subject or object single though of  simple mind  under observation merged in self-conscious. In spiritual union the concept of duality is lost and only self conscious of soul glow and prevails all over.

Conscious Mind is interior formless directory of living human body and  natural  essence state of natural. Its depth is endless and beyond the measurement of any cosmic power of universe. Outer directory of mind is called  simple mind  where thought  and information knowledge of human being and lack of spiritual knowledge are flowing.

Interior directory of mind is called  control mind   and pertain to major directory of mind. Again in outer directory of the  control mind   are floating emerging karma that becomes basis of bent of mind and natural of all human being. In middle directory of  control mind   exists seed karma or sleeping karma that determine the life path and run the cycle of life and is felt as separate identity from other life form and soul.

insight vision , meditation, spiritual union, union  of conscious with interior core of mind and self conscious are common worlds relating to formless mind and most misinterpreted and misunderstood words. The mind that is beyond the  natural  elements and matter elements of body form of any life form is itself formless and difficult to express as all languages are based on forms. The formless mind and its related indications are matter of consciousness, experience and feeling and difficult to convey in words as they pertain to  natural  and formless essence of natural state and beyond the catch of seeing, tasting, hearing, smelling, touching of sense organs of human being. Guru Patanjali has explained the definition of these words in first 10 steps of this book

The interior most directory of  control mind   is the meeting point of soul in form of self-conscious with  natural  essence state in form of being ness. When this being ness is experienced and realized in spiritual union, the  control mind   realizes spiritual knowledge of self conscious of soul and breaks its connection from the being ness that is  natural  essence of natural. 

When the insight vision  in the selected thought of a place or spot of  simple mind  become continuous and uninterrupted in  control mind  , it is called profound contemplation, reflection or meditation. It is through sustained insight vision  in  control mind   that a disciple reaches the state of meditation. Meditation or Contemplation or reflection is deeper and  natural r words than the insight vision  in terms of yoga disciple. In insight vision , sometime many other thought  of the  simple mind  also act and break connection of  simple mind  to the  control mind  . Where as in meditation the insight vision  of single thought of  simple mind  flow regularly to  control mind  . As such Meditation consists in the incessant continuity of contemplation in a directory of  control mind  .

It is when the  simple mind  along with its numerous thought  disappear and observer  control mind   becomes the observed by self-conscious that meditation starts. When thought is entirely concentrated in a directory of  control mind   and the  control mind   becomes its own field of observation, it is then that meditation gets ushered in. Meditation is the 7^th limb of the preparatory discipline of yoga. Meditation commences when the  control mind   is focused consciously by insight vision  on a thought of place or subject or object feeling. Thereafter, the  control mind   becomes stable and static in its focus on the feeling of that place and subject or object thought. The  control mind   also becomes aware of the flow of feeling regarding that very place and that very subject or that very object. When the feeling of thought of place or subject or object on which the  control mind   gets stabilized and made static and steady and on which the  control mind   gets concentrated and connected with, it is then that the disciple reaches the state of meditation or reflection or contemplation.

The continuation of insight vision  or sustained insight vision  in the flow of feeling regarding single thought of a place, subject or object is called meditation. At the time of disciplined cultivation of the perfect disciple discipline of insight vision  the specific directory of the formless  control mind   with which insight vision  gets linked, stops the thought  going in it. insight vision  remains focused on a feeling in the specific cell of the formless  control mind   and keeps on consciously swimming in the flow of this feeling. Further, insight vision  tries to attain spiritual knowledge by making concerted and sustained efforts. It is then that the state of meditation or reflection or contemplation commences.

The  control mind   has millions of formless cell and in the  control mind   of every cell; there is a specific feeling of numerous subjects or objects of  natural  or matter world. Further, in the every specific cell of feeling of  control mind  , there is lack of spiritual knowledge and spiritual knowledge both of which keep flowing in the form of memory. On the top of the cell of feeling is lack of spiritual knowledge, which on meditation is felt to be in the form of false thought. In the middle of the cell is the true knowledge that on meditation is experienced in the form of true thought or feeling. In the depth of the conscious cells of mind there is spiritual knowledge that in spiritual union with self-conscious is experienced. In order to cultivate the perfect discipline of meditation, descend is to be made into the feeling in  control mind   in one go and in a continuous and sustained manner.

When once the link of insight vision  of a thought of  simple mind  gets broken from  simple mind , it descends deep into depth of the feeling of the  control mind   and it gets broken from thought of insight vision  also. As such, insight vision  is to be focused by going beyond the thought of  simple mind  during the state of meditation.

The Great Sage Patanjali says that there are innumerable cells in the  control mind  . The cell of each  control mind   contains different and variegated thought  in respect of different and variegated subjects and objects of knowledge’s and spiritual powers of natural. Each thought is saturated with the craving of subject matter of thought. It is in the craving that waves for attachment and affection, hatred and enmity or fear exist. Under these waves lies lack of spiritual knowledge about the subject matter of the thought. Under that lack of spiritual knowledge, lies spiritual knowledge that throws light about this lack of spiritual knowledge. In the deepest depth lies hidden spiritual knowledge about the subject matter of natural essence and self conscious of soul. An ordinary human being when consciously feeling is not able to feel correctly. What he feels is the  simple mind ’s cravings of innumerable subject matter and lack of spiritual knowledge. In the first attempt on insight vision  in  control mind   this impure craving gets awakened. The result is that nothing ever gets felt.

On the contrary, the  simple mind  becomes restless by thinking. Attachment and affection, hatred and enmity or fears about the subject matter of thought are thought out by the  simple mind . It is then that body,  control mind   and soul that do not get into the comprehension and grasp of insight vision . The result is that the  simple mind  is unable to meditate on these subjects. It is only by the disciplined cultivation of the five limbs of perfect discipline that the form or shape of the cravings or thought  from the directory of the  simple mind  gets eliminated. What remains behind is only the  natural  seedless form of these cravings of thought  in the directory of  control mind  .

It is by insight vision  consciously in state of meditation that the  control mind   becomes unperturbed and becomes calm. The subject matter of that thought flow remain the same but in form of feeling with insight vision . During disciplined cultivation of meditation, descend is made into the depth of the subject matter of feeling. Other than the subject matter of feeling, keeping other thought  of  simple mind  and feeling of  control mind   as thought and feeling free and intellect free, tantamount to disciplined cultivation of meditation.

The Great Guru says that the practice of descending into the depth of thought at one go is called meditation. This is the 7^th limb of the disciplined cultivation of yoga. No preparatory action needs to be undertaken for entering the state of meditation. It is only by stabilizing the body, breath, organs of action, thought senses and innumerable thought  of  simple mind  that self conscious is to be felt in respect of a desired place or subject or object in  control mind  . No thought  are to be floated over the feeling of the desired subject or object or place in  control mind  . Effort is to be made to descend deep into the depth of thought  and feeling in meditation discipline.

The Great Sage says that at the time of cultivating the discipline of meditation, perfecting the discipline of restraint, the discipline of observance of culture, the discipline of posture, the discipline of control of psychic breath, the discipline of withdrawal of organs of action and thought senses and the smoke of innumerable thought  which keeps on spreading in the  simple mind , is to be stopped altogether. It is by converting the smoke of thought  into clouds and by dispersing these thought  into the form of feeling that they are to be consciously ejected in meditation.