I'm speaking of the Bible in the sense of truth. Of course, to be saved we must be sealed with the Spirit and the Spirit guides us within the truth (written Word). But not to reveal hidden or new revelation.
The word "revelation" gets a bad wrap and is misused. It's not just scripture. It is also answered prayer or the leading of the Spirit. In fact, all of scripture remains head knowledge until we walk in it. Then, when we do, the fullness is revealed to us. But there is also who we are in the Lord. That specificity is not found in the scriptures. It is something the Spirit only knows.
For example, if we ask the Lord for a job and we get three offers which on do we take? Typically, a man will weigh the pros and cons of each, decide which choice benefits him and his family the most, and he will choose that one. But this is, at best, wisdom from below. It's not evil but carnal: any man on earth can use such means to make a decision and the Spirit is not required.
I knew a man. I walked with him closely. He wanted to speak with me about an opportunity as his work place. Before he spoke I said to him what I saw in the Spirit "Whatever your decision, it is clear the Lord is increasing your influence over people." With that simple word he knew what to do.
Later, he had another opportunity. He came to speak with me again. This was a much bigger one which included complete ownership of a company. He was an honorable man and a good boss. Such people the Lord puts over others so they might benefit from his character. He did his due diligence and checked out the finances first. I saw this an an opportunity to not only prosper him but to also answer the desire of his wife's heart: she wanted her children close. He decided to purchase the company and now all their children work within the company. One child even moved back from living 1000 miles away.
These things were not written in the Bible, per se, but it is written that the Lord knows the most minute details of our lives. Our direction is not left to chance or to carnal endeavors like brainstorming or simply laying the template of past experiences upon potential opportunities. Being led by the Spirit requires that we know His mind in the moment. It's our Father's pleasure to reveal things to us. I have that on good account:
"Then Jesus answered and said to them, “Most assuredly, I say to you, the Son can do nothing of Himself, but what He sees the Father do; for whatever He does, the Son also does in like manner. For the Father loves the Son, and shows Him all things that He Himself does..."