I did an experiment, today, to test your theory.
Standing before this breaker panel…
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…invoking all my power and authority as an electrician, I loudly and firmly declared
“Let there be a deadfront cover on this panel!”. Nothing happened.
I tried it again, several times, trying different variations on wording, and how I waved my hands.
Nothing.
So, I tried something else.
Without any more words, I opened this box, that was leaning against the wall below the panel…
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I picked up my tools, and installed the deadfront cover that I found in the box.
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It seems that words did nothing. Using my tools and my skills is what it took to install a cover on this panel.
Well, OK, there were some words involved a few steps back, when my supervisor instructed me to install deadfront covers on the panels in a certain area. But it was actions that made it happen.
Metaphorical and allegorical descriptions in the Bible notwithstanding, I do not think it is any different with God and His creations.
When God said,
“Let there be light!”, I do not think it was His words that caused there to be light. It was workers responding to His instructions, gathering huge amounts of hydrogen together into one place, until there was enough to collapse upon itself under its own gravity, and begin the process of nuclear fusion, becoming a star suitable to support the Earth that He would later instruct to be created, and the processes that He would direct to be set into motion thereupon.