"If a man think himself to be something, when he is nothing, he deceiveth himself." (Paul to the Galatians)
An expert who operates as a know-it-all is a dangerous animal indeed. Why? Because he assumes that the knowledge he has gained covers all the ground.
In effect he assumes the role of Omniscience, and too often many bow down in submission. Then the expert's arrogance, fed by a submissive audience, turns him into a nasty creature indeed when his mortality is exposed. Human organization tends to magnify the problem.
Martin Armstrong eloquently states what the Old Testament well documents: "history repeats only because the passions of man never change from century to century." Passions of man? Pride in a self apart from God. Totally predictable.
But in order to avoid being deceived, we must get why man is nothing. "What is not Life, Wisdom, Truth or Love, and their idea, is but a fading error, and empty dream." (1st Ed S&H) In other words, if we fail to reflect our Maker, we are a fading error, an empty dream. The dream may appear elaborate, successful, but it is ultimately nothing.
"Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap. For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting." (Paul)
Assigning God, Spirit, to the back seat while we navigate through life ensures the inevitable cycle of mortal existence. Acknowledging Spirit as All, and we His outcome, we embark on an eternally progressive path. "He to whom 'the arm of the Lord' is revealed will believe our report, and rise into newness of life with regeneration."(S&H)