"Even Apollos had to have some of his teachings straightened out by Priscilla and Aquila."
This actually is a great passage to look at, being pertinent to the OP, so I am glad you mentioned it.
Here is the text & another supporting one.
Acts 18:24-28 Meanwhile a Jew named Apollos, a native of Alexandria, came to Ephesus. He was a learned man, with a THOROUGH KNOWLEDGE (lit. 'powerfully capable of handling') of the Scriptures. 25 He HAD BEEN INSTRUCTED IN THE WAY OF THE LORD & he spoke with great fervor & taught about Jesus ACCURATELY, though he knew ONLY the baptism of John. 26 He began to speak boldly IN THE SYNAGOGUE. When Priscilla & Aquila heard him, they invited him TO THEIR HOME & explained to him the way of God MORE ACCURATELY. 27 When Apollos wanted to go to Achaia, the brothers & sisters encouraged him & wrote to the disciples there to welcome him. When he arrived, he was a great help to those who by grace had believed.
28For he vigorously refuted his Jewish opponents in public debate, proving from the Scriptures that Jesus was the Messiah.
Romans 16:3-5 Greet Prisca & Aquila, my fellow workers in Christ Jesus, 4 who risked their necks for my life, to whom not only I give thanks but all the churches OF THE GENTILES give thanks as well.
5 Greet also the CHURCH IN THEIR HOUSE.
I Cor 16:19 The churches in the province of Asia send you greetings. Aquila & Priscilla greet you warmly in the Lord & so does the church that meets AT THEIR HOUSE.
What do we know about Apollos from this first passage?
*He was a learned man, much like Paul. (Acts 26:24; John 7:15)
*He had a thorough knowledge & powerful grasp of the Scriptures (2 Tim 3:14-17)
*He had been instructed in the way of the Lord.
*He spoke with fervor in the Spirit (Young's Literal Translation)
*He taught the things about JESUS ACCURATELY, though he knew (was familiar with) only the baptism of John.
*He began to speak boldly in the synagogue in Ephesus.
*Priscilla & Aquila took him into their house/home & MORE accurately explained the way of God to him.
*He traveled to Achaia (churches of Corinth, Philippi, Thessalonica, etc.) on recommendation by the brethren at Ephesus & greatly HELPED those who by grace had believed.
*He powerfully convinced & utterly refuted the Jews in public, showing from the Scriptures that Jesus is the Christ.
In the first passage, the Greek word translated 'accurately' in verse 25 is the same word used in verse 26, also.
We notice that Priscilla & Aquila were more mature Christians, having been fellow workers with Paul in various cities & wherever they were located, they had a local church in their house in areas where the brethren were primarily Gentile.
So we see that Apollos, as a Jew, primarily dealt with Jews, both in the synagogue & in public until he met Priscilla & Aquila, who had Gentiles meeting in their home.
Though Apollos was thoroughly familiar with the OT Scriptures & could accurately teach concerning Jesus as the Christ, using the OT Scriptures that 'are able to make one wise for salvation through faith in Christ Jesus' (2 Tim 3:15)--he apparently was not familiar with the mystery of the gospel revealed to the apostle Paul by the Lord Jesus, concerning the Gentiles being fellow heirs of the same body of Christ, one new man in place of the two.
Eph 3:4-6 In reading this, then, you will be able to understand my insight into the mystery of Christ, which was not made known to men in other generations as it has now been revealed by the Spirit to God’s holy apostles & prophets. This mystery is that the GENTILES ARE FELLOW HEIRS, members of the same body & partakers of the promise in Christ Jesus through the gospel.
Here the mature couple could more accurately, more exactly, more perfectly add to what Apollos already knew, bringing more light on OT Scriptures concerning this mystery. Their association with Paul as his fellow workers brought them this additional teaching concerning the fullness of the gospel message.
As a result of their instruction, Apolllos then wanted to go to the Gentile churches in Achaia, to put into practice his more thorough knowledge of the gospel, enriching what he already knew. He became a great help to those Gentile churches. It mentions he refuted the Jews IN PUBLIC as opposed to just going to the synagogues where only Jews were.
We can all learn from this example. I have. Thank you Willie T!
And I apologize, Jen, for simply focusing on your false teaching without being 'more accurate' in instructing you concerning the Person of the Holy Spirit & why our relationship with Him as person to person is so important. You mentioned that you are newer to the Christian faith & doctrine, so I should have taken that into account, as well as finding out your background of how you learned about Christianity.
I am always amazed at how being immersed in the living Word of God, which is living, active & powerful to change lives, is able to change each one of us, so that we might delight in His will & walk in His ways through the filling & guidance of the Holy Spirit & all to the glory of His holy name. Amen.