Another fact also has to be borne in mind. The three are stages of growth and so not three mutually exclusive types of knowledge. The Iswaraprerithajnana will not contradict the yukti-yuktajnana; it will only bring to light what is unmanifest in the yukti-yuktajnana. The later stage only confirms and elaborates the previous ones. Afflicted by the vagaries of the mind and its fancies, some take their distorted attitudes as God given or Grace-induced. And, they may even call upon others to heed their counsel. They lead men astray by their barren guidance. These morons announce that their absurd prattle is God-propelled.

True teaching can never be counter to the yukti-yuktajnana, the conclusion arrived at by discrimination and evaluation. The Yogas mentioned above are all established in consonance with this view. Rajayoga has to be practised mostly by the mind and its resolution. This is a vast subject and so, we shall consider here only its central theme. It is something that is the only refuge for the lowest of the low and the highest of the Yogis - namely, single-pointed meditation. For the person engaged in research in a laboratory, for one walking along a road, or for a scholar reading a book, or an individual writing a letter, or driving a car, the concentration of all their attention on the articles before them and the activity they are engaged in is very important. He understands the nature and peculiarities of the object he is handling. The more intense your concentration, the more successful will be your activity. When the mental abilities are focussed on one effort, knowledge can be acquired quicker and from a wider field. And, that is the only way by which knowledge can be earned.

Concentration will enable one, whoever he is, whatever the activity he is engaged in, to finish it much better than otherwise. Whether in material assignments, or in ordinary day-to-day work or in spiritual Sadhana, concentration of mental energies is a must, if success is to be achieved. It is the key that can open the treasure-chest of Jnana. This is the most important aspect of Rajayoga. It can even be said that it is the only important aspect of that Yoga. Millions of unwelcome, unwanted, unnecessary and even harmful thoughts enter our minds and confound their activities. These have to be kept out; the mind has to be guarded and controlled and kept under our rigorous supervision. Rajayoga is the one refuge for persons endeavouring to win this victory.