The nature of the mind is flickering and unsteady. But a self-realized yogé has to control the mind; the mind should not control him. One who controls the mind (and therefore the senses as well) is called gosvämé, or svämé, and one who is controlled by the mind is called godäsa, or the servant of the senses. A gosvämé knows the standard of sense happiness. In transcendental sense happiness, the senses are engaged in the service of Håñékeça or the supreme owner of the senses—Kåñëa. Serving Kåñëa with purified senses is called Kåñëa consciousness. That is the way of bringing the senses under full control. What is more, that is the highest perfection of yoga practice.