An excerpt from "Got Questions.org" entitled, "What does the Bible say about knowledge?" states: "The word knowledge in the Bible denotes an understanding, a recognition, or an acknowledgment. To “know” something is to perceive it or to be aware of it. Many times in Scripture, knowledge carries the idea of a deeper appreciation of something or a relationship with someone. The Bible is clear that the knowledge of God is the most valuable knowledge a human being can possess. But it is also clear that simply being aware of God’s existence is not sufficient; the knowledge of God must encompass the deep appreciation for and relationship with Him." This article may be viewed at: What does the Bible say about knowledge?/gotquestions.org
Reference: Philippians 1:9
Note: On a human level, the more time we spend with a person, the more we get to know them. The more time we spend talking to God and reading His Word, the more we get to know Him.