1 Corinthians 14:21 KJVS
 In the law it is written, With men of other tongues and other lips will I speak unto this people; and yet for all that will they not hear me, saith the Lord.
If you look at the above verse using a reference bible it will direct you to Isaiah 28:11&12. I included a few verses besides 11&12 for the sake of context.
Isaiah 28:9-13 KJVS
 Whom shall he teach knowledge? and whom shall he make to understand doctrine? them that are weaned from the milk, and drawn from the breasts.  For precept must be upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little:  For with stammering lips and another tongue will he speak to this people.  To whom he said, This is the rest wherewith ye may cause the weary to rest; and this is the refreshing: yet they would not hear.  But the word of the Lord was unto them precept upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little; that they might go, and fall backward, and be broken, and snared, and taken.
First let me state that I received the baptism of the Holy Spirit and spoke in tongues. It was a very powerful, life changing experience. I soon found that the church where I received the baptism of the Holy Spirit was too much centered around the law and Old Testament. In the Isaiah verses above line upon line, precept upon precept to me, clearly points to the law of Moses. The law was given because of transgressions until the seed, Jesus Christ came, Gal 3:19. The rest mentioned in verse 12 is the rest mentioned in Hebrews 4:10&11,which points to God, along with the sacrifice and offerings of Jesus Christ, doing the work of salvation in us, Php 2:12&13. And yet some of those who received the baptism of the Holy Spirit did not hear, verse 12, just as Paul wrote in 1 Co 14:21. They fall backward, are broken, and snared, and taken. Isa 28:9 is very similar to a couple verses in Hebrews, so much so I am surprised a reference bible does not refer them to one another.
Hebrews 5:12-14 KJVS
 For when for the time ye ought to be teachers, ye have need that one teach you again which be the first principles of the oracles of God; and are become such as have need of milk, and not of strong meat.  For every one that useth milk is unskilful in the word of righteousness: for he is a babe.  But strong meat belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil.
Both verses in Isaiah and Hebrews point to the lack of moving on into sound doctrine and the lack of spiritual growth by the individuals these verses are written about. A wake up call to those not yet weaned from the milk, who are unskilled in the word of righteousness. There are no chapter divisions in the original bible manuscripts and pertinent information can be overlooked due to this fact. The 6th chapter of Hebrews is no exception.
Hebrews 6:1-3 KJVS
 Therefore leaving the principles of the doctrine of Christ, let us go on unto perfection; not laying again the foundation of repentance from dead works, and of faith toward God,  Of the doctrine of baptisms, and of laying on of hands, and of resurrection of the dead, and of eternal judgment.  And this will we do, if God permit.
If God permit! The real obstacle I see in the way of going on into perfection, according to the Isaiah prophecy, is the law, and laws of religious institutions. The taste not, handle not , holiness ordinances.
Colossians 2:20-23 ESV
 If with Christ you died to the elemental spirits of the world, why, as if you were still alive in the world, do you submit to regulations-  “Do not handle, Do not taste, Do not touch”  (referring to things that all perish as they are used)-according to human precepts and teachings?  These have indeed an appearance of wisdom in promoting self-made religion and asceticism and severity to the body, but they are of no value in stopping the indulgence of the flesh.
The last verse makes a crucial point. Denying the flesh alcohol, for a example, does not lead to self control in that area of your life. Only God correcting you and by dying to the lusts of the flesh can a person attain self control. Sound doctrine is understanding that being justified and sanctified is a function of grace, not of our works, Eph 2:8&9. Trying to observe the ten commandment and ordinances of religious institutions gets you no where because the flesh is too weak to observe these laws, Ro 8:3&4. We can only achieve the righteous requirement of the law by walking after the Spirit and allowing the Spirit to bring about these changes in our life. Most religious institutions do not want you weaned from the milk and may even be largely comprised of members who have not received the baptism of the Holy Spirit. But even churches whose members are Spirit filled may prevent their members from being weaned from the milk. In my mind it is difficult to separate justification and sanctification in regards to perfection as a Christian matures, because they both are due to God’s working us, Php 3:9-12, He 10:14. And both take place during the life of a believer. I used to enjoy woodworking before my neck pain made the activity too painful. I designed and made most of my furniture. Oak hutch, end tables, beds and assorted tables. The scriptures fit together in my mind and are linked by similar words and concepts, very similar to joining pieces of wood together to make a piece of furniture. Comparing spiritual things with spiritual, 1 Co 2:13. Scripture of course is more complicated and intricate. The words exercised and righteousness in He 5:13&14 are mentioned in another set of verses in Hebrews.
Hebrews 12:11 KJVS
 Now no chastening for the present seemeth to be joyous, but grievous: nevertheless afterward it yieldeth the peaceable fruit of righteousness unto them which are exercised thereby.
Now we are starting to get into the meat of sound doctrine. In order to mature as children of God we have to be disciplined. Let us look at the above verse in context.
Hebrews 12:4-11 KJVS
 Ye have not yet resisted unto blood, striving against sin.  And ye have forgotten the exhortation which speaketh unto you as unto children, My son, despise not thou the chastening of the Lord, nor faint when thou art rebuked of him:  For whom the Lord loveth he chasteneth, and scourgeth every son whom he receiveth.  If ye endure chastening, God dealeth with you as with sons; for what son is he whom the father chasteneth not?  But if ye be without chastisement, whereof all are partakers, then are ye bastards, and not sons.  Furthermore we have had fathers of our flesh which corrected us , and we gave them reverence: shall we not much rather be in subjection unto the Father of spirits, and live?  For they verily for a few days chastened us after their own pleasure; but he for our profit, that we might be partakers of his holiness.  Now no chastening for the present seemeth to be joyous, but grievous: nevertheless afterward it yieldeth the peaceable fruit of righteousness unto them which are exercised thereby.
The various forms of the word chastening, chasteneth that appear in the NT are translated from the Greek word paideuō, with it’s different suffix endings. It also appears in the following verses.
1 Corinthians 11:31-32 KJVS
 For if we would judge ourselves, we should not be judged.  But when we are judged, we are chastened of the Lord, that we should not be condemned with the world.
We see that being chastised is being judged by the Lord. And this chastening is a function of grace. Teaching in verse 12 below is translated from the Greek word paideuō.
Titus 2:11-12 KJVS
 For the grace of God that bringeth salvation hath appeared to all men,  Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world;
Being chastised is also linked to communion with the sufferings of Christ. Notice how similar Titus 2:11&12 is to 1 Pe 4:1&2. Being scourged by God is suffering, and we, just as our Lord, learn obedience from suffering, He 5:8.
1 Peter 4:1-2,12-13 KJVS
 Forasmuch then as Christ hath suffered for us in the flesh, arm yourselves likewise with the same mind: for he that hath suffered in the flesh hath ceased from sin;  That he no longer should live the rest of his time in the flesh to the lusts of men, but to the will of God.  Beloved, think it not strange concerning the fiery trial which is to try you, as though some strange thing happened unto you:  But rejoice, inasmuch as ye are partakers of Christ’s sufferings; that, when his glory shall be revealed, ye may be glad also with exceeding joy.
Our being justified and sanctified is not all about suffering and being scourged. There is the washing by the water of the word, Eph 5:26 and the washing of regeneration and renewal of the Holy Ghost. They both in fact may be different aspects of the same. Many years in the past the Spirit moved strongly on me when reading certain verses propelling me on to grow in grace, and in the knowledge of our Lord and Saviour Jesus Christ. That does not happen as often as in the past. In the last decade the washing of regeneration and renewal of the Holy Ghost has been more abundant in my life.
Titus 3:5-7 KJVS
 Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost;  Which he shed on us abundantly through Jesus Christ our Saviour;  That being justified by his grace, we should be made heirs according to the hope of eternal life.
The abundant washing of regeneration, and renewing of the Holy Ghost that is poured out on us is having communion with the Spirit of God, which results in joy and the strengthening of our inner man.
1 Thessalonians 1:6 KJVS
 And ye became followers of us, and of the Lord, having received the word in much affliction, with joy of the Holy Ghost:
Ephesians 3:16 KJVS
 That he would grant you, according to the riches of his glory, to be strengthened with might by his Spirit in the inner man;
Colossians 1:11 KJVS
 Strengthened with all might, according to his glorious power, unto all patience and longsuffering with joyfulness;
The washing of regeneration, and renewing of the Holy Ghost has been literally keeping me close to God for the last 10 difficult years while living with pain and weakness due to a spinal cord injury. I was paralyzed for ten days in 1984 but as I get older the pain and weakness has become more pronounced. The Spirit knows what is going on in our mind and hearts and about the time I start getting wore down and weary of my situation the washing and regeneration of the Holy Ghost moves over me even if I am disgruntled and not really seeking it. This washing often takes place when I listen to Christian music in the morning and think to give the sacrifice of the fruit of my lips giving praise and thanks to name, He 13:15. This washing is also the carrot that has offset the the stick of chastisements , that are aimed at my perfecting holiness in the sight of God, 2 Co 7:1. Those that received the baptism of the Holy Ghost and speak in tongues may in fact fail to go on into perfection, He 6:1, due to the fact they are never weaned from the milk, Isa 28:9. But as the verse states you can only go on into perfection if God wills it. I think that Apostle Paul’s admonishment to the Galatians church would be a effective verse to end this article. Especially for those who have the Spirit and want to go on to perfection.
Galatians 3:3 KJVS
 Are ye so foolish? having begun in the Spirit, are ye now made perfect by the flesh?