Spiritual Understanding and Comprehension

Here when it say's that King Nebuchadnezzar was driven from men, into the wilderness, I've tried to research this as best I could but not much about it. He must have been going through issues that taught him about God, even with what the Babylonians called his mental decline, it was part of his discovering God period which brought him to conclude rightly about God, with a restoration of His sanity or understanding.