Hi all, I’d just like to give my two cents in this matter.
I think the reason why God doesn’t communicate with us directly is that He wants us to use our higher capacities in having a relationship with Him.
Human beings have the capacity to go beyond the knowledge that is initially given to them. For example, when we look up at the sky, we initially see that it is colored blue. The knowledge that the sky is colored blue is a “given” because we are able to notice it almost immediately by our senses. We don’t need to exert our minds just to know that the sky is blue. However, to know the reason
why the sky is blue does need some mental exertion and scientific study. Now, I think most of us would agree that this human capacity to know what is “beyond the obvious” is higher than the simple ability of humans to know the obvious. We use more of our intellectual capacities in going beyond what is initially given than remaining in it. Also, the things that we get to know beyond the given are often more important. After all, if our knowledge didn’t go beyond the sense information that we initially receive, then we would probably be no different from other animals.
And I think that’s the reason why God doesn’t literally talk to us. If He did that, then our knowledge of Him would be obvious or a given.But if that is so, then what would be the use of our reason and intellect? There would be none, since if God is the highest goal in our lives, then once we know Him, we need nothing. But still, the higher capacities of our minds and souls would be wasted. Our ability to know that which is beyond the given and the joy that often comes with knowing these hidden things would be gone. No longer would there be scientists that marvel at their discovery of some previously unknown principle in physics.Neither would they feel the satisfaction of having their hard efforts be rewarded by such a discovery. There also wouldn’t be anyone who would appreciate poetry or even a witty joke, since doing so would need going beyond the given literal meaning. Finally, Faith and Hope, which are such beautiful aspects of our human experience, would be gone.
I hope that what I said was understandable. My knowledge of this idea is still sketchy

. It actually comes from my hazy memory of what St. Augustine and St. Thomas More’s arguments were as to why scripture shouldn’t be literal.