The word "knowledge" in the underlined phrase above is "Epignosis" (Greek), which means accurate, complete, and exact knowledge. So, to be filled with the knowledge of God's will means your spirit is programmed by the full, accurate knowledge of His will. In computer language, programming refers to a series of instructions that can be interpreted and executed by a computer. Now, the Word of God is a series of revelation and instructions that can be interpreted and executed by your spirit. If the Word can be sufficiently introduced and engrafted into your spirit, your spirit can interpret and execute the Word, delivering to you the way of life that's consistent with God's perfect will and purpose. This is the reason for the teaching of God's Word; it's so your spirit can be programmed by accurate knowledge, so you can be all that God has destined you to be. Colossians 3:16 says, "Let the word of Christ dwell in you richly in all wisdom…." When your spirit is programmed by the accurate knowledge of God's Word, your faith will not buckle in the hour of crisis; you'll always prevail against the adversities of life. Keep growing in the knowledge of God's Word. Become so hungry for the Word that it makes no difference what subject you're studying or is being taught, it gets your attention, and arrests your interest. There 're no vain subjects in the Word of God. God's Word never returns to Him void, but reproduces what it talks about in your life. You may be in a service, and the preacher is discussing what you might not consider to be an exciting subject; pay attention, and receive the Word with faith and meekness into your spirit. Your spirit, at such times, is being programmed with the Word for the days ahead,such that in the day of trouble, you'll act in line with the Word. The day will come when you'll need that Word, and all you'd have to do would be to pull it out from the reservoir of your spirit.