Mantra Yoga, strictly speaking a system of Yoga based on the repetition of and meditation on sacred words, aims at the attainment of perfection by means of wisdom, understanding life, and seeing through it. The best word to use for such a person is "seer." He sees into life, into the depth of life, through a person, through an affair, through a thing. He sees not only the outside, the surface, but by means of concentration he sees through things as with a torch that illuminates whatever is seen. This seeing is called Jnana. The journey through life is made by that means.