Hi Kepha,
These verses might help you out with understanding how the indwelling Holy Spirit causes a person to pray according to God the Father's will, and to receive what he asked for, which was according to God the Father's will.
John 14:8 - 26 Philip said to him, Lord, show us the Father, and it suffices us. Jesus said to him, Have I been so long time with you, and yet hast thou not known me, Philip? he that has seen me has seen the Father; and how sayest thou, Shew us the Father? Believest thou not that I am in the Father, and the Father in me? the words that I speak to you I speak not of myself: but the Father that dwells in me, he does the works.
Believe me that I [am] in the Father, and the Father in me: or else believe me for the very works' sake. Verily, verily, I say to you, He that believes on me, the works that I do shall he do also; and greater [works] than these shall he do; because I go to my Father.
And whatsoever ye shall ask in my name, that will I do, that the Father may be glorified in the Son.
If ye shall ask any thing in my name, I will do. If ye love me, keep my commandments. And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever; the Spirit of truth; whom the world cannot receive, because it sees him not, neither knows him: but ye know him; for he dwells with you, and shall be in you.
I will not leave you comfortless: I will come to you. Yet a little while, and the world sees me no more; but ye see me: because I live, ye shall live also. At that day ye shall know that I [am] in my Father, and ye in me, and I in you.
He that hath my commandments, and keeps them, he it is that loves me: and he that loves me shall be loved of my Father, and I will love him, and will manifest myself to him.
Judas said to him, not Iscariot, Lord, how is it that thou wilt manifest thyself to us, and not to the world?
Jesus answered and said to him, If a man love me, he will keep my words: and my Father will love him, and we will come unto him, and make our abode with him.
He that loves me not keeps not my sayings: and the word which ye hear is not mine, but the Father's which sent me.
These things have I spoken to you, being present with you. But the Comforter, [which is] the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said to you.
Remember, the Holy Spirit only speaks what He has been given by the Father and the Son: John 16:13 Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, [that] shall he speak: and he will shew you things to come. 14 He shall glorify me: for he shall receive of mine, and shall shew [it] unto you. 15 All things that the Father has are mine: therefore said I, that he shall take of mine, and shall shew [it] to you.
Now, here are some people who were not amongst the twelve, who spoke according to the Holy Spirit's leading.
Paul was quite sure the Lord wanted everyone to know Him. He knew he was to preach to Gentiles as well as Jews, and so this comes out clearly in his exhortation to the Greeks in Athens. I mention this, so that you realise none of the disciples expected that only they would be empowered by the Holy Spirit. And, this includes the women who were in the upper room on the day of Pentecost, which neophyte tries so hard to excoriate from the Biblical record.
Acts 9:10 - 19 And there was a certain disciple at Damascus, named Ananias; and to him said the Lord in a vision, Ananias. And he said, Behold, I [am here], Lord. And the Lord [said] to him, Arise, and go into the street which is called Straight, and enquire in the house of Judas for [one] called Saul, of Tarsus: for, behold, he prays, and has seen in a vision a man named Ananias coming in, and putting [his] hand on him, that he might receive his sight.
Then Ananias answered, Lord, I have heard by many of this man, how much evil he has done to thy saints at Jerusalem: and here he has authority from the chief priests to bind all that call on thy name.
But the Lord said to him, Go thy way: for he is a chosen vessel to me, to bear my name before the Gentiles, and kings, and the children of Israel: for I will shew him how great things he must suffer for my name's sake.
And Ananias went his way, and entered into the house; and putting his hands on him said, Brother Saul, the Lord, Jesus, that appeared to thee in the way as thou camest, has sent me, that thou mightest receive thy sight, and be filled with the Holy Ghost.
And immediately there fell from his eyes as it had been scales: and he received sight forthwith, and arose, and was baptized. And when he had received meat, he was strengthened. Then was Saul certain days with the disciples which were at Damascus.
Acts 11:28 And there stood up one of them named Agabus, and signified by the Spirit that there should be great dearth throughout all the world: which came to pass in the days of Claudius Caesar.
Acts 17:30 And the times of this ignorance God winked at; but now commands all men every where to repent: [women are included in 'men']
Acts 19:6 And when Paul had laid hands upon them, the Holy Ghost came on them; and they spoke with tongues, and prophesied. 1 Cor 14:3
Acts 20:17 And from Miletus he [Paul} sent to Ephesus, and called the elders of the church. 18 And when they were come to him, he said to them... 20 ... how I kept back nothing that was profitable [to you], but have shewed you, and have taught you publickly, and from house to house, 21 Testifying both to the Jews, and also to the Greeks, repentance toward God, and faith toward our Lord Jesus Christ. 22 And now, behold, I go bound in the spirit to Jerusalem, not knowing the things that shall befall me there: 23 Save that the Holy Ghost witnesseth in every city, saying that bonds and afflictions abide me.
Acts 21:3 Now when we had discovered Cyprus, we left it on the left hand, and sailed into Syria, and landed at Tyre: for there the ship was to unlade her burden. 4 And finding disciples, we tarried there seven days: who said to Paul through the Spirit, that he should not go up to Jerusalem.
Acts 21:8 And the next [day] we that were of Paul's company departed, and came to Caesarea: and we entered into the house of Philip the evangelist, which was [one] of the seven; and abode with him. 9 And the same man had four daughters, virgins, which did prophesy. 10 And as we tarried [there] many days, there came down from Judaea a certain prophet, named Agabus. 11 And when he was come to us, he took Paul's girdle, and bound his own hands and feet, and said, Thus says the Holy Ghost, So shall the Jews at Jerusalem bind the man that owns this girdle, and shall deliver [him] into the hands of the Gentiles.
There are more, which I post later, just to show more clearly how inclusively Paul regarded other believers in Christ.