The teacher in the school, the doctor in the hospital, the farmer in the field, the businessman in the stock-exchange, everyone engaged in professional activity, can transmute his dynamism into pure devotion by adopting a humble and worshipful inner attitude. In the fourth system, man is employed in a very special process in which all thought is made to merge in God. One becomes more and more aware of God as the Centre of being. This is a very beautiful path also. It is known as Raja Yoga or the Yoga of Concentration and Meditation.
Thought is movement of the mind-stuff.
Thus, thought, Prana and the body are all interconnected. Total subdual and control of the body may be brought about by keeping it in a fixed and steady posture. Subdual and control of the inner psychic energy may be obtained by practising techniques of breath-control. And ultimately, all the scattered rays of the mind may be withdrawn from the multifarious universe and made to concentrate solely upon the one idea of God. In this culminating process, man is raised above the level of the mind, taken into a state of superconsciousness in which the experience of oneness with God is realised, and he is released forever from the bondage to the body and from death itself.