The longing you express to know God for yourself on a personal level is itself a gracious work, for no man can even hunger after God until the Holy Spirit has first visited him. You are dead in trespasses and sins until He quickens you, and that quickening, that comforting, that making you to love Christ, is not inferior to the power which made men speak with tongues.
You ask, have you received the Holy Spirit since you believed. Hear the question put to those at Ephesus, for it is needful still. The Holy Spirit is the Author of all spiritual life and holiness. A holy man is the workmanship of the Holy Spirit. And the Holy Spirit always keeps sweet company with Jesus Christ. He comes not to glorify Himself with strange signs, but to glorify Christ, for Jesus said, He will receive of Mine and show it unto you. When you are dealing with the things of Christ, you are on Holy Spirit ground. He deals with Christ, and He never goes beyond the written Word. If a man tells you the Holy Spirit has revealed to him something that is not in the Bible, he mistakes his own fancy for revelation. The deeper revelation you seek will not be found in a sound upon the tongue, but in beholding Christ as He is revealed in Scripture, by the Spirit's own illumination.
To pray in the Holy Spirit, as Jude exhorts, is not to utter an unknown ecstasy, but to pray in the Holy Spirit's power, by the Holy Spirit and through the Holy Spirit. The carnal mind knows nothing of this, but the child of God learns that he cannot pray aright without the Spirit's help. He is willing to help you to pray, to tell you how to pray, to make you feel your need and your adoption. There is no rubric except this, in the Holy Spirit. That is indispensable. If it is praying in the Holy Spirit, all else may be as you will, whether with few words or many, whether aloud or in secret groanings which cannot be uttered.
And take heed that you grieve not the Holy Spirit, for it is a tender and touching thing that He should make His palace in so narrow a heart as yours, though it be but a cottage, a very hovel, unholy and unclean, yet He condescends to make it His continual abode. He is grieved by unbelief and by unholiness of life, when men walk not according to the Gospel. Entire dependence upon Him is your wisdom. Without Him there is no life and force and power.
My prayer for you therefore is this, that the blessed God, Father, Son and Holy Spirit, who must work together upon every soul that is saved, would grant you not a new tongue but a new sight of Christ. May the Lord give you the Spirit of adoption, bearing witness in your spirit that you are a child of God, teaching you out of the Word what is Christ's and showing it to you, quickening you to holiness, and helping your infirmities in prayer, so that you may cry with understanding and with faith, Abba, Father, and glorify Christ in your life. May you be kept from seeking signs and wonders, and may you be satisfied to know Him whom to know is life eternal, even Jesus Christ whom the Spirit ever glorifies. Amen.