‘God alone sees the world from an objective angle.’
How does this author, or anyone else for that matter know such a thing as a certainty...? does the author presume to speak for the god he worships...?
When Jesus said His kingdom is not of this world, He meant it is not of the space time dimension but of another dimension, outside of the world (space/time dimension) and completely unreachable by men and their science. His kingdom is of this other dimension from which He looks down upon the world/space/time dimension as though a snow globe enclosed within the other dimension.
The author cites the God of all creation Who spoke and revealed Himself to certain men. If He had not done so no one would ever know of a dimension outside of the space/time dimension.
Your question, being properly of this space/time dimension, is fueled by outrage because no man could ever know "such a thing as a certainty" from within the snow globe if I AM WHO I AM had never entered into the globe to reveal Himself to the citizens of the snow globe.