Bhagwad Gita - Post 240

Verse 61

The Lord dwells in the hearts of all beings, O Arjuna, causing all beings, by His illusive power, to revolve as if mounted on a machine!

Ishvara, the Supreme Creator of the universe, is residing in the heart of all. He is all-pervading, transcendent, above this creation that He has manifested from Himself, yet residing in all hearts as the ruler of all, and also the Self of all. 

By a kind of power, which is called maya here—an inscrutable force, shakti, that He wields and exerts on everyone—He exercises a permanent control on all things. His rule of law does not require any emendation in the course of time. Once creation was willed, everything necessary for the maintenance of this creation was also simultaneously willed. 

Isavasya Upanishad says, 

The Svetasvatara Upanishad has a verse beginning with 

The Briharanyaka Upanishad has a verse beginning with,

The Taittiriya Upanishad III.IX.II beginning …

A verse from The Brihadaranyaka Upanishad beginning with

The Supreme Lord is the ultimate controller of everything animate and inanimate which are acting under His external energy prakriti the material substratum pervading physical existence from whence arise three gunas or modes of material nature which determines all actions based upon the karma or reactions to previous good and evil actions enacted in a physical body and five senses which is likened unto a machine. The purport is that just as a puppet master controls his puppets so does the Supreme Lord control the jivas.

This rule of law that He laid down at the beginning of creation for the purpose of the origin, the sustenance, as well as the end of all things does not require any change from moment to moment. 

That is to say, omniscience being the quality of God, Ishvara, there is no necessity for His omniscience to get amended from time to time. It does not call for changes under any circumstance. The whole thing is controlled permanently, for ever and ever, right from the beginning, as a machine may be controlled by an operator of the machine.

Behind all the ever changing phenomenon in the creation, there is a changeless Brahman, which, though remaining changeless, lends energy and illumines each and every aspect in this creation.

Shruti reveals at its pinnacle in all its grandeur and splendor in Kenopanishad, thus:- 

What speech cannot reveal, but what reveals speech;

What one cannot feel with the mind; but because of which they say the mind feels;

What cannot be seen by the eye; but by which the eyes are able to see;

What cannot be heard by the ear; but by which the ears are able to hear;

That which one breathes not with his breath; but by which breath is breathed,

KNOW THAT TO BE BRAHMAN

Love.