"For who hath known the mind of the Lord, that he may instruct Him? But we have the mind of Christ."
So, if there's a "right brain" and a "left brain", are there bifurcated minds as well? I mean, how would we know? Unless it were totally and unassailably proven that we saw things from the one vantage point, we wouldn't be able to posit that our minds were, or weren't, separated. The thing is, we don't see our mind from without. We see with our mind. And so, as Christians, it behooves us to operate in "the mind of Christ", the mind to which Paul refers in his first letter to the Corinthians (2:16)
Our correct mind
"Let his heart be changed from man's, and let a beast's heart be given unto him; and let seven times pass over him." (Daniel 4:16) So Nebuchadnezzar hears this and gets a class A interpretation from "Daniel, whose name was Belteshazzar" (4:19) and then proceeds to reign for a year and after exalting himself for the last time gets forcibly humbled by God. In one of the most bizarre turns of mind, Nebuchadnezzar takes on the form of a lowly beast and proceeds to act in accordance for seven years. It took seven years for his head to clear and for him to return to some semblance of sanity. He declares at the end of his ordeal that "I Nebuchadnezzar praise and extol and honour the King of Heaven, all whose works are truth, and His ways judgment: and those that walk in pride He is able to abase. (4:37) It is spoken of from someone who truly knew what it was like to live out of a diseased and "reprobate mind" (Romans 1:28).
God takes our clarity and mental acuity seriously. In other words, He wants us to have it. It's one thing to think on one's own. To see the options available to you throughout your day and make decisions and declarations in light of a clear head. But if all you're going to do is exalt yourself as you ignore the God who took pains to see to it you got a mind that wasn't crushed somewhere along the way, that clarity cannot last. Especially if you number yourself among His children. I am guilty of this. Of using my mind to think about and plan and scheme and notice all on my own. The other side of this is that, as we live in Christ and "the mind of Christ", we have in our minds, the same freedom He grants us spiritually. Freedom to think, to plan, to do. To live.
"Thou wilt keep him in perfect peace, whose mind is stayed on Thee. Trust ye in the Lord for ever: for in the Lord Jehovah is everlasting strength." (Isaiah 26:3-4)