God hasn't changed the way the body of Christ works. We all have a role, being lively stones in the spiritual temple, Jesus Christ being the chief cornerstone. There are apostles today, as there are prophets teachers, evangelists and pastors. There has been no instruction that the body of Christ needs only pastors today, as some would like to think. We all work together for the benefit of the church. We are called to fulfill a particular role in the body, and we receive gifts according and appropriate to that role.
I believe that the apostles today are overlooked because they like Paul are the weak things of the world chosen to confound the wise. It is not popular or common to suffer for righteousness sake, but if someone is doing that, it is likely you will see a demonstration of the power of God there also, as their faith develops, as they begin to grow into the person God has called them to be.
I believe the apostles today can lay hands on people to receive the Holy Spirit, and can cast out demons, and many will speak with new tongues and prophesy also.
The authority in the church today (measured by humility before God and effectiveness in ministry) rests with the apostles and prophets, who are able to minister in the Spirit as God leads. Of course the ministerial boundaries are not mutually exclusive, so that e.g Paul being an apostle is also a prophet, and there can be prophetic teachers and apostolic evangelists etc.
We have taken the power out of the church if we teach that God stopped raising up apostles and prophets, and that there are no miracles and signs today. If you find yourself in a church like that, where they have the FORM of godliness but deny the power, get out of there.
Ephesians 4:
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And he gave some, apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;
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For the perfecting of the saints, for the work of the ministry, for the edifying of the body of Christ:
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Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ: