A yogi cannot attain realization because he thinks his body to be body and world to be the world and fails to see them as consciousness and thinks his experience of Samadhi is because of his individual effort

A yogi cannot attain realization because he thinks his body to be body and world to be the world and fails to see them as consciousness and thinks his experience of Samadhi is because of his individual effort. The individual experience is limited to waking experience is mere illusion. Thus even his Samadhi is also limited to the waking experience, which is mere illusion. He thinks the thoughtlessness is Samadhi but thoughts are of the individuality. Thoughts disappear even in deep sleep. Therefore deep sleep is not wisdom. If one thinks thoughtlessness is Samadhi and Samadhi is Brahman then any one get knowledge of Brahman by taking sleeping pills or hemp.   

Yogi’s they limit the mind to the physical entity, thus they fail to realize the non-dual truth.  They stick up to their accepted truth and they remain stagnant with their belief.

The individual experience is mere   illusion. Thus without first examining them and inquiring into them thoroughly is to delude oneself. The three states common to all; therefore, one must begin his inquiry analysis and reasoning on the true base. It is only after it has inquired into the nature of the three states that he should inquire into who is the knower/witness. If, however one inquires into the knower before the analysis of the three states, then it is mere mysticism. What are these three states? Must precede' what is ‘I’?'