When we were told to stand and pray in tongues, I prayed as loudly as those next to me, thinking, "I, too, can speak in tongues. Here I go." This is a proud prayer. God does not hear such prayers.
Again, what makes a prayer pure and worthy is the purity of heart.
You may be thinking it in a proud way, but it doesn't mean the others in the prayer meeting were. If praying in tongues is the standard in the church and the majority are baptized in the Holy Spirit, why would they be doing it in pride? To impress the few that might not be filled? If by some chance they happened to be standing nearby?
Most pentecostals would want their fellow believers to be filled, not feel some sort of pride that they have something that another doesn't.
I'm not sure if you're implying this, but praying loudly doesn't mean a person is prideful. Psalms says make a joyful noise unto the Lord. God never asks us to subdue our worship or do it quietly. He loves our praises. As long as there's overall order in the church service, this should never be an issue.
4. God commanded (through Paul) to all tongue speakers to receive interpretation. Therefore, all tongue speakers who have not received interpretation need to remain humble, acknowledging they are in disobedience to God.
I think you're referring to what Paul said in I Cor. 14:28 "if there is no interpreter, let him keep silent in the church". Here Paul is talking about the
gift of kinds of tongues as exercised for the edification of the church. He's not talking about the initial physical evidence of the baptism in the Holy Spirit. These are two separate elements.
One is for the edification of one's own spirit (personal prayer), the other is for the edification of the church.
In fact, when one legitimately speaks out in tongues for the purpose of interpretation in a church service, they are specifically compelled and quickened by the Holy Spirit to do so. It's not their carnal minds thinking "hey, I think I'll speak in tongues this morning and get an interpretation". It would follow then, that we simply would not be able to speak in tongues normally at home or in prayer, if God didn't want us to use it at those times. But we can, so we should.
We would be doing ourselves a great disservice if we only used our spiritual tongue when compelled to by God during a church service.
As Paul says, "I will pray with the spirit [tongues], and I will pray with the understanding [known language]" (I Cor. 14:15). We should be praying always with all prayer and supplication in the Spirit (Eph. 6:18). And sometimes we don't know what we should pray, but the Spirit Himself makes intercession for us (Rom. 8:26).