TAITTIRIYA UPANISHAD... The utterance of the peace chant propitiates the devatas. The spiritual path is rendered smooth through their grace. All obstacles are removed . You will not forget what you have learnt. you will posses good health. You will have good meditation.
SVETASVATARA UPANISHAD.... They who practiced meditation realized or saw as the cause of creation the power of God, Devatma-shakti, hidden in His own qualities, Gunas, which alone rules over all these causes enumerated above, beginning with time and ending with the individual soul.
Love the teaching of upanishad. But I believe people and God do not need a mediator- gurus. I always skeptical of gurus, especially the current population. In hind sight, we can find good ones- Vivekananda...but if one is living in current day, how to know which one is the right guru, best stay away from human-gurus, in pursuit of God.
@hermitcrab... you are very right about Gurus population of this times . Definitely there will be some genuine Gurus but yes it is very very hard, next to impossible to find them though.
PRASHNOPANISHAD...... SERVICE TO THE GURU WITH FAITH AND DEVOTION PURIFIES THE MIND QUICKLY. THIS IS THE MOST POWERFUL PURIFYING AGENT.
KENOPANISHAD.... You will become immortal while living in this body , if you attain knowledge of Brahman. You need not wait till you leave this body.
TAITTIRIYA UPANISHAD..... The repetition of "Om-Shanti" thrice is to remove the three kinds of obstacles namely Adhyatmika (from our self), Adhidaivika (from the heavens), and Adhibhautika (from living beings).