Physicists have discovered the first solid evidence of what's called "cosmic inflation":
Physicists say they now have the smoking gun that shows the universe went through extremely rapid expansion in the moments after the big bang, growing from the size of a marble to a volume larger than all of observable space in less than a trillion-trillionth of a second.
Think about that for a moment. The universe, in less time than we can possibly imagine, went from essentially nothing to the size of a marble, and then, in a trillionth, trillionth of a second, it grew at a speed far faster than the speed of light to a size larger than what we can observe today. In other words, before a billionth of a second had passed in the creation of the universe, all of its forces, laws, parameters, and constants had been fixed. All the matter that would eventually precipitate out from the primordial energy existed potentially.
There were no stars or galaxies yet, of course, but these are relatively minor details in the creation narrative. All the foundational necessities, all the heavy lifting, was done in far less than an instant. The rest was just the pretty colors of a fireworks rocket. The real work was building the rocket. And this was done ... instantly. If a human had been around to see it happen it would have looked as if the essentials of the universe all came into existence instantaneously.
It would seem as if God said, "Let there be a cosmos," and there was a cosmos.