Raja yoga deals entirely with the mind and phychic power and may be called the science of applied psychology. It aims to remove all mental obstructions and to gain a perfectly controlled, healthy mind. The main purpose of its training is to develop and strengthen the will as well as the power of concentration and to lead the seeker after truth through the path of concentration and meditation to the ultimate god of all religions. As the name'Raja' i.e. royal and regarded as the king among others yogas. It is because the power of concentration and willpower are not only greater than any physical force,but are essential to the acquisition of all other powers. The man who possesses a vigorous mind controlled by a well developed will, with strong power of concentration, can easily become the master of physical nature and in a short time attain the realisation of Truth. Raja yoga claims that whoever gained mastery over his mind,can govern all the phenomena of nature. It tea...