The Bible is only a record of God’s two stages of work in the Age of Law and the Age of Grace; it is not a record of the entirety of God’s work.
Bible Verses for Reference:
“I have yet many things to say to you, but you cannot bear them now. However, when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatever he shall hear, that shall he speak: and he will show you things to come” (Jhn 16:12-13).
“He that has an ear, let him hear what the Spirit says to the churches” (Rev 2:17).
“Behold, the Lion of the tribe of Juda, the Root of David, has prevailed to open the book, and to loose the seven seals thereof” (Rev 5:5).
The entire Bible records the work of two ages: One was the work of the Age of Law, and one was the work of the Age of Grace. The Old Testament records Jehovah’s words to the Israelites and His work in Israel; the New Testament records Jesus’ work in Judea.
from “The Vision of God’s Work (2)” in The Word Appears in the Flesh
You must know how many parts the Bible includes; the Old Testament contains Genesis, Exodus…, and there are also the books of prophecy that they wrote. At the end, the Old Testament finishes with the Book of Malachi. It records the work of the Age of Law, which was led by Jehovah; from Genesis to the Book of Malachi, it is a comprehensive record of all the work of the Age of Law. Which is to say, the Old Testament records all that was experienced by the people who were guided by Jehovah in the Age of Law. … the Bible’s Old Testament primarily records Jehovah’s work of guiding Israel, His use of Moses to guide the Israelites out of Egypt, who rid them of the Pharaoh’s shackles, and took them out into the wild, after which they entered Canaan and everything following this was their life in Canaan. All apart from this is records of Jehovah’s work throughout Israel. Everything recorded in the Old Testament is Jehovah’s work in Israel, it is the work Jehovah did in the land in which He made Adam and Eve. From when God officially began to lead the people on earth after Noah, all that is recorded in the Old Testament is the work of Israel. And why is there not recorded any work beyond Israel? Because the land of Israel is the cradle of mankind. In the beginning, there were no other countries apart from Israel, and Jehovah did not work in any other places. In this way, what is recorded in the Bible is purely the work in Israel at that time. The words spoken by the prophets, by Isaiah, Daniel, Jeremiah, and Ezekiel … their words foretell His other work on earth, they foretell the work of Jehovah God Himself. All this came from God, it was the work of the Holy Spirit, and apart from these books of the prophets, everything else is a record of people’s experiences of Jehovah’s work at the time.