Yogi aims at a direct spiritual experience of the Absolute Truth. A Philosopher’s interest in the pursuit of the Truth is chiefly theoretical, he being chiefly concerned with the satisfaction of the demand of his intellect; a Yogi’s interest is thoroughly practical, in as much as he is predominantly concerned with the satisfaction of the fundamental demand of his soul. A Philosopher does not cease to be a philosopher, even if his practical life is not in tune with his conception of the Truth, but a Yogi ceases to be a Yogi, if his entire life is not disciplined in strict accordance with his idea of the Truth. The knowledge which a Philosopher attains and can possibly attain by the most careful applications of the principles and rules of Logic is indirect or mediate knowledge (Paroksha Jnana); while the knowledge which a Yogi seeks and expects to attain through the purification and refinement and illumination of his entire consciousness is direct or immediate knowledge (Aparoksha Jnana). An earnest Philosopher makes serious attempts to purify and refine and enlighten his reason and to liberate it from all kinds of logical fallacies and imperfections, so that it may form the most valid and most comprehensive conception of the Absolute Truth. An earnest Yogi undergoes a systematic course of self-discipline for the purification of his body and senses and mind, for the suppression of his desires and passions and worldly tendencies, for the liberation of his thought from the bondage of all preconceived ideas and notions, for the concentration of his attention upon the unknown but yearned-for object of his search and for the elevation of his entire consciousness to higher spiritual planes, so that the self-luminous Absolute Truth may perfectly illumine this consciousness and directly reveal Itself to it. A Philosopher is an aspirant for understanding the Absolute Truth by making it an object of his refined logical conception, while a Yogi is an aspirant for realizing the Truth by elevating his consciousness to the highest spiritual plane, in which the subject-object-relativity also vanishes and the consciousness becomes practically one with the Absolute Truth.