Ability of God
There are billions of people living in this world. Who knows their minds, hearts, and living situations except God alone?
Even Christ Jesus did not declare that He knew everything about everybody. But Christ Jesus said that God knew, for example, the number of hairs of everybody. He implied that God knew what everybody was thinking deep in its mind.
Indeed it is said that there are atoms in the number of about 10 raised to the power of 80, namely 10^80, in this universe. In theory, God must know every state of these atoms in any moment, since He is almighty.
So, the ultimate end of science and technology of human beings is to have ability to know every state of 10^80 atoms. And the mankind might have ability to manipulate all these atoms according to their will. At the moment the mankind can be said to get a little closer to God. The mankind might be able to crate any situation in the universe, including the fate of them.
But still the universe is what was created by God. And to create this universe, the mankind must be something beyond this universe, which must be in theory impossible.
In other words, if the mankind can control this universe completely, it cannot be still God.
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Mat 7:22 Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works?
Mat 7:23 And then will I profess unto them, I never knew you: depart from me, ye that work iniquity.