Consider the following verse:

"Those whose intelligence has been stolen by material desires
surrender unto demigods and follow the particular
rules and regulations of worship according to
their own natures."
[Bhagavad Gita 7:20]

Does the Gita state that people who are materialistic worship demigods i.e. ‘gods’ besides the One True God?

UPANISHADS:

The Upanishads are considered sacred scriptures by the Hindus.

The following verses from the Upanishads refer to the Concept of God:

"Ekam evadvitiyam"
"He is One only without a second."
[Chandogya Upanishad 6:2:1]

[The Principal Upanishad by S. Radhakrishnan page 447 and 448]
[Sacred Books of the East, volume 1 ‘The Upanishads part I’ page 93]

"Na casya kascij janita na cadhipah."
"Of Him there are neither parents nor lord."
[Svetasvatara Upanishad 6:9]

[The Principal Upanishad by S. Radhakrishnan page 745]
[Sacred Books of the East, volume 15, ‘The Upanishads part II’ page 263.]

"Na tasya pratima asti"
"There is no likeness of Him."
[Svetasvatara Upanishad 4:19]

[The Principal Upanishad by S. Radhakrishnan page 736 & 737]
[Sacred Books of the East, volume 15, ‘The Upanishads part II’ page no 253]

The following verses from the Upanishad allude to the inability of man to imagine God in a particular form:

"Na samdrse tisthati rupam asya, na caksusa pasyati kas canainam."
"His form is not to be seen; no one sees Him with the eye."
[Svetasvatara Upanishad 4:20]
[The Principal Upanishad by S. Radhakrishnan page 737]
[Sacred Books of the East, volume 15, ‘The Upanishads part II’ page no 253]

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THE VEDAS
Vedas are considered the most sacred of all the Hindu scriptures. There are four principal Vedas: Rigveda, Yajurveda, Samveda and Atharvaveda.

1. Yajurveda
   The following verses from the Yajurveda echo a similar concept of God:
   
   

   1. "na tasya pratima asti
      "There is no image of Him."
      [Yajurveda 32:3]⁵
      
      

   2. "shudhama poapvidham"
      "He is bodyless and pure."
      [Yajurveda 40:8]⁶
      
      

   3. "Andhatama pravishanti ye asambhuti mupaste"
      "They enter darkness, those who worship the natural elements" (Air, Water, Fire, etc.). "They sink deeper in darkness, those who worship sambhuti."
      [Yajurveda 40:9]⁷
       Sambhuti means created things, for example table, chair, idol, etc.
      
      

   4. The Yajurveda contains the following prayer:
      "Lead us to the good path and remove the sin that makes us stray and wander."
      [Yajurveda 40:16]⁸
      
      

      ---

1. Rigveda
    

   1. The oldest of all the vedas is Rigveda. It is also the one considered most sacred by the Hindus. The Rigveda states in Book 1, hymn 164 and verse 46:
      "Sages (learned Priests) call one God by many names."
                                [Rigveda 1:164:46]
      
      

   2. The Rigveda gives several different attributes to Almighty God. Many of these are mentioned in Rigveda Book 2 hymn 1.
      
      Among the various attributes of God, one of the beautiful attributes mentioned in the Rigveda Book II hymn 1 verse 3, is Brahma. Brahma means ‘The Creator’. Translated into Arabic it means Khaaliq. Muslims can have no objection if Almighty God is referred to as Khaaliq or ‘Creator’ or Brahma. However if it is said that Brahma is Almighty God who has four heads with each head having a crown, Muslims take strong exception to it.
      
      Describing Almighty God in anthropomorphic terms also goes against the following verse of Yajurveda:
      
      "Na tasya Pratima asti"
      "There is no image of Him."
                    [Yajurveda 32:3]
      
      Another beautiful attribute of God mentioned in the Rigveda Book II hymn 1 verse 3 is Vishnu. Vishnu means ‘The Sustainer’. Translated into Arabic it means Rabb. Again, Muslims can have no objection if Almighty God is referred to as Rabb or 'Sustainer' or Vishnu. But the popular image of
       

      ---

      ⁹[Atharveda Samhita vol 2 William Dwight Whitney page 910]
      
      

      
      

      Vishnu among Hindus, is that of a God who has four arms, with one of the right arms holding the Chakra, i.e. a discus and one of the left arms holding a ‘conch shell’, or riding a bird or reclining on a snake couch. Muslims can never accept any image of God. As mentioned earlier this also goes against Svetasvatara Upanishad Chapter 4 verse 19.

      
      

      "Na tasya pratima asti"
      "There is no likeness of Him"

      
      

      The following verse from the Rigveda Book 8, hymn 1, verse 1 refer to the Unity and Glory of the Supreme Being:
      

   3. "Ma cid anyad vi sansata sakhayo ma rishanyata"
      "O friends, do not worship anybody but Him, the Divine One. Praise Him alone."
      [Rigveda 8:1:1]¹⁰
      

   4. "Devasya samituk parishtutih"
      "Verily, great is the glory of the Divine Creator."
      [Rigveda 5:1:81]¹¹
      
       
      

Brahma Sutra of Hinduism:

The Brahma Sutra of Hinduism is:

"Ekam Brahm, dvitiya naste neh na naste kinchan"

"There is only one God, not the second; not at all, not at all, not in the least bit."

Can the dispassionate study of the Hindu scriptures help one understand the concept of God in Hinduism?