I have friends who quoted me the following verse:
The Spirit searches all things, even the deep things of God. For who knows a person’s thoughts except their own spirit within them? In the same way no one knows the thoughts of God except the Spirit of God. (1 Cor 2:10-11)
From the above verse, it seems that all we need is the Holy Spirit, and Him alone when it comes to Bible study. So do we still need to listen to those pastors and teachers in the churches? After all, “no one knows the thoughts of God except the Spirit of God” and that would include those puny human teachers isn’t it?
BUT…there is a very important (and biblical) purpose for pastors and teachers.
So Christ Himself gave the apostles, the prophets, the evangelists, the pastors and teachers, to equip his people for works of service, so that the body of Christ may be built up until we all reach unity in the faith and in the knowledge of the Son of God and become mature, attaining to the whole measure of the fullness of Christ. (Eph 4:11-13)
As much as we would like to think we are all filled with the wisdom of the Holy Ghost and do not need another human to teach us what to believe, the truth is, God thinks otherwise.
Now you are the body of Christ, and each one of you is a part of it. And God has placed in the church first of all apostles, second prophets, third teachers, then miracles, then gifts of healing, of helping, of guidance, and of different kinds of tongues. (1 Cor 12:28-31)
As we can see , it is God who thinks we all need a teacher for proper guidance in understanding the Word.