Yasya deve para bhaktir
yatha-deve tatha gurau
tasyaite kathita hy arthah
prakasante mahatmanah
“Only unto those great souls who have implicit faith in both the Lord and the spiritual master are all the imports of Vedic knowledge automatically revealed.” (Svetasvatara Upanisad 6.3)
Again, more fudging of the words of the Upanishads, selective quoting and fanciful reinterpretation by theologians. The translation above is incorrect: The word para-bhakti means supreme-devotion, it does not mean faith, and you know I am right To be devoted to something does not mean one must have faith, it simply means one is completely focused and absorbed in something. Bhakti in the context of the Upanishads is nothing like the Bhakti that is later reformulated in the Bhakti movement and the Bhakti Sutras Vedantins practice Bhakti through devotion to the self, by constantly remembering the self, contemplating and meditating on it - not through idol worship or ritual as practiced in Bhakti Yoga.
The Upanishads are the last texts you should be citing to support your position because the spirit of the Upanishads is opposed to ritual and worship of external gods. The major Upanishads present the doctrine of Advaita, non-dualism, the non separation of Atman and Brahman and the identity of Atman and Brahman. The use of the word ‘lord’ in the Upanishads denotes the self, not god as understood by Vaishnavists.
If we look at the Upanishad you cited we can see the context of what lord means:
I-3: Practising the method of meditation, they realized that Being who is the God of religion, the Self of philosophy and the Energy of science; who exists as the self-luminous power in everyone; who is the source of the intellect, emotions and will; who is one without a second; who presides over all the causes enumerated above, beginning with time and ending with the individual soul; and who had been incomprehensible because of the limitations of their own intellect.
Here it is very explicitly says that the Being/lord is the self luminous self who yogis realize through meditation.
I-6: In this infinite wheel of Brahman, in which everything lives and rests, the pilgrim soul is whirled about. Knowing the individual soul, hitherto regarded as separate, to be itself the Moving Force, and blessed by Him, it attains immortality.
Here the Upanishad explicitly says the self-realized one knows that the individual soul(Atman) is identical to the supreme soul(Brahman)
I-7: This is expressly declared to be the Supreme Brahman. In that is the triad. It is the firm support, and it is the imperishable. Knowing the inner essence of this, the knowers of Veda become devoted to Brahman, merge themselves in It, and are released from birth.
Here the Upanishad directly equates the self to the Supreme Brahman and defines devotion as merging oneself completely into Brahman. In Vedanta devotion is constant remembrance and meditation on the self.
I-15-16: As oil in sesame seeds, as butter in curds, as water in underground springs, as fire in wood, even so this Self is perceived in the self. He who, by means of truthfulness, self-control and concentration, looks again and again for this Self, which is all-pervading like butter contained in milk, and which is rooted in self-knowledge and meditation – he becomes that Supreme Brahman, the destroyer of ignorance.
Here the Upanishad clearly demonstrates that the self is present as the essence of all using the analogies of oil in sesame seeds, butter in curd, fire in wood, which realized in meditation and once realized ones becomes the supreme Brahman. Again showing the identity of Atman and Brahman.
I-16: This Divinity pervades all directions in their entirety. He is the first-born (Hiranyagarbha). He has entered into the womb. He alone is born, and is to be born in future. He is inside all persons as the Indwelling Self, facing all directions.
Another clear reference saying that Brahman, variously called the great being, the divinity and the first born is identical to the self in all people.
Translated by Swami Tyagisananda – Published by Sri Ramakrishna Math, Chennai
The Upanishad uses the term Atman and Brahman synonymously throughout. Thus it stand proven that the use of the word ‘Lord’ in the verse you translated denotes the self and not an external god as understood by Vaishnavists.
The Upanishads do not support Vaishnavist theology, because they make it clear Atman = Brahman and even explicitly state “I am Brahman” This is why they had to be reinterpreted by Vaishnavist theologians like Ramunjacharya and Madvacharya, using elaborate verbal gymnastics, twisting and turning the words and fudging them until it supported the party line:
Ye are sinners, unholy and diseased, ye must redeem yourself by serving and worshiping the one true and only god and doing his will only, not thy will, else ye will be punished for thy insolence. Do not ye think that ye can know with thy puny mind his glory, only men of faith and his chosen ones can know him.
(Now ye be a good devotee and live as we tell ye and do everything we say, for we are men of god )