The answer to this question could take volumes. And both Dottard and Hold To The Rod have hit major points. But essentially you are looking at the difference between knowledge versus love; the knowledge God provided through His word versus the love of God. The beginning of knowledge comes from hearing the word (Rom. 10:17), resulting in faith in Christ for those who believe and obey (Matt 7:26; Luke 11:28; John 5:24), which is only possible because of the love of Christ and the love of God (John 3:16), which leads us to emulate and grow into that fullness of God’s love.
Being filled with the Holy Spirit had immediate results of speaking the word of the Holy Spirit. It is the knowing, followed by the speaking.
”and they were all filled with the Holy Spirit, and began to speak with other tongues, according as the Spirit was giving them to declare.” (Acts 2:4, YLT)
”44 While Peter is yet speaking these sayings, the Holy spirit fell upon all those hearing the word, 45 and those of the circumcision believing were astonished -- as many as came with Peter -- because also upon the nations the gift of the Holy Spirit hath been poured out, 46 for they were hearing them speaking with tongues and magnifying God." (Acts 10:44-46, YLT)
”...and Paul having laid on them [his] hands, the Holy Spirit came upon them, they were speaking also with tongues, and prophesying," (Acts 19:6, YLT)
” ...but be filled in the Spirit, 19 speaking to yourselves in psalms and hymns and spiritual songs, singing and making melody in your heart to the Lord,” (Eph. 5:18-19, YLT)
Those that were filled with the Holy Spirit were filled with the knowledge of His word and were speaking those words of the Holy Spirit. He filled them with His words.
Prophesying – speaking the words the Holy Spirit gave them
Praying In public – speaking the words the Holy Spirit gave them
Tongues / languages – speaking in other languages the words the Holy spirit gave them
Interpreting – translating the words the Holy Spirit gave them
The miracle of the gift of the Holy Spirit on the day of Pentecost and at the house of Cornelius was of the knowledge of the words of God. The miracle of the 1st century AD was that instantaneous access to the knowledge, the filling up with the knowledge the Holy Spirit provided that caused them to speak His words to others. Today, we have to work at and study to obtain that knowledge. But it is at our fingertips through His scriptures which the Holy Spirit has maintained for us. It is the knowing.
”`This [is] the covenant that I will make with them after those days, saith the Lord, giving My laws on their hearts, and upon their minds I will write them,'” (Heb. 10:16, YLT, from Jer. 31:33)
That indwelling of the Holy Spirit is the indwelling of His word which is written on our hearts. The growth in the knowledge of His word brings faith, and more faith, and more knowledge, and more faith which results in love, and more love to the fullness of the love that God has for us that He gave His only begotten Son to save us.
All of the miracles of healing, and casting out demons, etc. were performed by God through prayer to confirm the words that were spoken by the people who had received the Holy Spirit. Those miracles were always to confirm the word (1 Kings 17:21-24; Acts 2:22; Acts 19:11-12; James 5:13-15).
See how this knowledge then results in the love that we are to have for God and for one another “unto” the fullness of God’s love. This is Paul’s prayer.
Eph. 3:14-21 -
”14 For this cause I bow my knees unto the Father of our Lord Jesus Christ, 15 of whom the whole family in the heavens and on earth is named,
16 that He may give to you, according to the riches of His glory, with might to be strengthened through His Spirit, in regard to the inner man,17 that the Christ may dwell through the faith in your hearts, in love having been rooted and founded,
18 that ye may be in strength to comprehend, with all the saints, what [is] the breadth, and length, and depth, and height, 19 to know also the love of the Christ that is exceeding the knowledge, that ye may be filled -- to all the fulness of God;
20 and to Him who is able above all things to do exceeding abundantly what we ask or think, according to the power that is working in us, 21 to Him [is] the glory in the assembly in Christ Jesus, to all the generations of the age of the ages. Amen." (YLT)
Not with, but to, or unto the fullness of God. Paul’s prayer that we might be filled unto is a measure of capacity, as the goal we are to attain.
Excerpt from Expositor’s Greek -
”The εἰς cannot mean with or in, as it is taken by some, but must = “into” or “unto,” expressing the measure up to which the being filled is to take effect, the limit of the filling, or the goal it has before it. The AV and the other Old English Versions erroneously give “with”; except Wicl., who makes it “in,” Cov., who renders “into,” and Rhem., “unto”. …
It brings the whole paragraph to a conclusion worthy of itself, lifting us to a conception which surpasses all that has preceded it, and carrying us from the great idea of the fulness in Christ to the still greater idea of the fulness in God. Nor is it any valid objection to it that what is thus put before us is what can never be attained in this life. It is an ideal, essentially the same as that contained in the injunction to be perfect as our Father in heaven is perfect (Matthew 5:48).“ Source: Biblehub
Excerpt from Gill’s Exposition -
”Now the apostle prays, that these saints might know more of this love; that their knowledge, which was imperfect, might be progressive. ..” Source: Ibid
Excerpt from Vincent’s Word Studies -
”Note the recurrence of that; that He would grant you; that ye may be strong; that ye may be filled. With is better rendered unto, to the measure or standard of. Fullness of God is the fullness which God imparts through the dwelling of Christ in the heart; Christ, in whom the Father was pleased that all the fullness should dwell (Colossians 1:19), and in whom dwelleth all the fullness of the Godhead (Colossians 2:9).” Source: Ibid
Paul’s prayer in Eph. 3:14-19 is a process that grows from being filled with the knowledge of God’s word, through the faith of that word in our hearts, to the fullness of God’s love for us.
Further thoughts at :
Testing the Spirits – Part V (a) - ShreddingTheVeil
Testing the Spirits – Part V (b) - ShreddingTheVeil
Testing the Spirits – Part V (c) - ShreddingTheVeil