When there is no direct conscious thought and deliberate thought of any material object through the medium of senses; such a thought is called inference true thought of the wisdom of the experiment . When it is not possible to have direct thought about a thing, the best and the most truthful thought that comes to the mind is called inference true thought of the wisdom of the experiment . It is only by repeated thought and constant practice that inference true thought of the wisdom of the experiment is experienced and felt by direct thought.

When there is no direct conscious thought and deliberate thought of wisdom through the senses and there is also no thought of inference wisdom, it then become essential to have belief in thought contained in religious scriptures and discourses of saints or prophets. This belief in accruing wisdom is essential in order to meditate thought about a particulars subject of wisdom. By having faith in the scriptural testimony of the saints or spiritual leader who have experienced the ultimate truth and who consciously and after great deliberations have written about it or their discourses, one gets correct wisdom. This type of thought is called proved thought or scriptural testimony. Such thought contains supreme thought.

The three sub kinds of true thought of the wisdom of the experiment  are superior to the four other kinds of thought. Because of his inherited tendencies of remaining unaware and un-conscious and inattentive towards realize true wisdom, Human being does nothing about transcending his limitations in his day-to-day simple thought. The thought passing through his unconscious state of mind are not related to finding the truth about the ultimate reality.  The result is that human being keeps himself engrossed in thought, which are a stumbling block for him to realize true wisdom of the ultimate reality. Thus his gains, comes under the category of verbal thought of conceived idea , false thought, thought of the dreams of the sleep  and thought of the memory of the hidden impression t.

Whatever wisdom human being tries to realize with the help of the above-mentioned thought is merely a reputation of his thought, which are far from the truth. These non-truthful thought combined with false wisdom result in creating a host of deeper thought leading to delusion and imaginative fancies. By remaining in a state of delusion and imaginative thought human being’s effort to think and realize spiritual wisdom of the ultimate truth and reality, remains fruitless. False wisdom and imaginative wisdom strengthens the ingrained memory of his childhood impressions and past experience. As his mental thought increases, he becomes increasingly a prey to mental diseases and disorders. Such thought leads to mental derangement and results in a spurt of mental and psychological ailments.

Most people try to realize spiritual wisdom with the help of their thought process. They keep on making sustained efforts throughout their life for this purpose. The thought process, however, is not a medium for the realization of spiritual wisdom of the subject. The path to gain spiritual wisdom lies through conscious thought, careful  thought and deliberate efforts by making the mind absolutely thought free. This is, however, impossible for most of human beings who desire to have a vision of formless God. In case such human being do make a start, it is difficult for their deluded mind to bear the radiance of this spiritual wisdom and illumination. Such an exposure to inner formless God’s brilliance and radiance can lead to mental sickness. Hence the great sage Patanjali says that before making efforts to realize spiritual thought about God, it is essential to empty the unconscious state of  thought of all thought and make it absolutely thought-free.

Before a human being become thought-free, it is, however, essential to evaporate the thick smoke of the vagaries of the thought. Thought, which in comparison with each other appear more false, are to be banished from the mind by constant practice. First of all the qualities of thought passing through the unconscious state of mind have to be upgraded. Thereafter even the upgraded and enhanced quality thought have also to be banished from the unconscious state of mind and the mind made totally thought-free. It may happen that in doing so the thought become rebellious. They become unbearable and torment the mind of the disciple. The Guru Patanjali says that the mind during  yoga is not to be torment and tortured. It has to be kept perfectly happy in thoughts under all circumstances. In the beginning and at the outset, the disciple has to generate and practice the first kind of thought namely true thought of the wisdom of the experiment . This he has to do through sustained efforts and constant practice. It is only after he has succeeded that he is to make his mind thought-free through continuous efforts and long practice.

In case an object is not perceived with the help of true thought of the wisdom of the experiment , efforts are then to be made to perceive it with the assistance of inference thought. If a disciple does not get enlightened about an object or subject with the help of true thought of the wisdom of the experiment , he is then to take recovery to the study of scriptures of religions in which he has faith. This he is to do in order to purify his thought pattern and then to arrive at the true thought of the wisdom of the experiment about the object and subject of his meditation. The  preceptor says that insight vision of true thought of the wisdom of the experiment cannot be gleaned and perceived merely by hearing  thought or studying thought or seeing  thought of religious scriptures of those saints who had themselves realized the truth. He says that in case disciple develops conscious faith in thoughts and firm belief in them, the wisdom contained in these thought of scriptures gets imparted to the disciple by inference. This wisdom there after becomes the disciple’s own wisdom and his own thought although gained by inference.

By long practice and conscious meditation such an inference thought with the passive of time becomes the disciplines own true thought of the wisdom of the experiment . With the help of this true thought of the wisdom of the experiment , a disciple can enter into a thoughtless stage. But in order to enter into this stage of thought, a disciple has to purify his entire thought process. He has even to rid his unconscious state of mind of true thought of the wisdom of the experiment , false thought, deep thought of the dreams of the sleep  and thought of the memory of the hidden impression t so that it becomes completely thought free. He has also to free his mind from the wisdom gained by him from the study of thought of religious scriptures of his religion believed and inference thought. Further he has even to surpass and abandon true thought of the wisdom of the experiment  of the wisdom of the experiment to make his mind enter into thought free stage.

The delicate subject of entering into one's mind should be handled very carefully, patiently and systematically and after making the mind absolutely thought free. Effort should never be made to deliberate or banish the entire range of thought at the same time. In a disciple does so; his efforts will be in fructuous. In case disciple does net an effort to purify his mind, then his effort to make his mind thought free will not only be fruitless but unbearable as well. Such an effort, on the contrary, can expose the mind to false thought; with the result that false wisdom will start descending into the discipline’s mind. The result will be that such a thought process can make the mind heartless and extremely harmful. During the practice of  yoga, it is therefore, essential that the mind be not unbearably tormented with thought. On the contrary it must be kept in a happy state of thought.

Patanjali tells the beginner that his thought and beliefs pertaining to religious thought and social practices, customs and traditions, speech and language which the learner had intuitively embodied and adopted and is prone to use them, are to be ejected out of his unconscious state of mind that is outer layer of inner conscious state of mind .The entire range of thought has to be made free of any likes and dislikes. The mind has to be made thoughtless from the thought that are even related to the chanting of any God’s name. Clinging to any thought and continuing to keep a hold on any though, will not take the mind to thought free state. The stranglehold of thought has to be broken and done away. Even thought of one's personal relations during practice of meditation and yoga have to be forsaken. In order to make the mind thought free, the first website page  is to understand the pattern of the entire range of one's thought. This pattern has to be understood with the assistance of human being’s intelligence.