Guru means spiritual master. Eva, eva means certainly. Not that if somebody thinks, "Oh, I can learn about myself without approaching any spiritual master." That is wrong. Actually eva, eva means certainly. One must. And this verb gacchet is used where this sense is used, "must." Gacchet, "must go," "must approach." That is the injunction of the Vedas. Similarly, the injunction of Śrīmad-Bhāgavatam is also tasmād guruṁ prapadyeta jijñāsuḥ śreya uttamam (SB 11.3.21).
Now, in order to approach a bona fide spiritual master, one must be very much disgusted with this material way of life. That is very nice qualification. Unless one is disgusted with this materialistic way of life, that actually in this materialistic way of life there is no happiness... This proposition must be convinced by one, that he should know certainly that "In the material way of life I cannot become happy." This is the first condition. Tasmād. Tasmād means "therefore." Similarly, in Vedānta-sūtra also, atha ataḥ brahma-jijñāsā. When we become fed up, disgusted with the materialistic way of life, natural inquiry is then "What is next?" That "next," in order to understand that "next," the Vedānta-sūtra says, the Vedic knowledge says that tasmād gurum evābhigacchet. Tasmād guruṁ prapadyeta. Therefore one should seek after a bona fide spiritual master and learn there. That is the Vedic injunction. So one who is actually convinced that "The materialistic way of life cannot make me happy," his duty is to seek after a bona fide spiritual master to be enlightened in the transcendental science of understanding oneself and what is God.