Seems like it would help us out a lot if God told everybody, "The Calvinists are right" (Or whichever denomination).
So many false teachings would be disproven in an instant, everybody would know which Church best aligns with God & His word...
So why not?
But through the Apostle He did, and does:
I appeal to you, brothers and sisters, in the name of our Lord Jesus Christ, that all of you agree with one another in what you say and that there be no divisions among you, but that you be perfectly united in mind and thought. My brothers and sisters, some from Chloe’s household have informed me that there are quarrels among you. What I mean is this: One of you says, “I follow Paul”; another, “I follow Apollos”; another, “I follow Cephas ”; still another, “I follow Christ.”
Is Christ divided? Was Paul crucified for you? Were you baptized in the name of Paul? I thank God that I did not baptize any of you except Crispus and Gaius, so no one can say that you were baptized in my name. (Yes, I also baptized the household of Stephanas; beyond that, I don’t remember if I baptized anyone else.) For Christ did not send me to baptize, but to preach the gospel—not with wisdom and eloquence, lest the cross of Christ be emptied of its power.....(1 Corinthians 1)
Therefore, as it is written:
“Let the one who boasts boast in the Lord.”
Brothers and sisters, I could not address you as people who live by the Spirit but as people who are still worldly—mere infants in Christ. I gave you milk, not solid food, for you were not yet ready for it. Indeed, you are still not ready. You are still worldly. For since there is jealousy and quarreling among you, are you not worldly? Are you not acting like mere humans? For when one says, “I follow Paul,” and another, “I follow Apollos,” are you not mere human beings?
Don’t you know that you yourselves are God’s temple and that God’s Spirit dwells in your midst? If anyone destroys God’s temple, God will destroy that person; for God’s temple is sacred, and you together are that temple.
Do not deceive yourselves. If any of you think you are wise by the standards of this age, you should become “fools” so that you may become wise. For the wisdom of this world is foolishness in God’s sight. As it is written: “He catches the wise in their craftiness” ; and again, “The Lord knows that the thoughts of the wise are futile.”
So then, no more boasting about human leaders! All things are yours, whether Paul or Apollos or Cephas or the world or life or death or the present or the future—all are yours, and you are of Christ, and Christ is of God. (1 Corinthians 3)