There are some within the body of Christ that say that Paul is not a proper apostle because he was not one of the original twelve, nor had he been accredited by the original apostles in Jerusalem. They say he had no right to give any direction to new and existing Christians, so we ought to pay no special attention to what he said. St Paul’s reply to all this is in Galatians 1:11-12

Dear brothers and sisters, I want you to understand that the gospel message I preach is not based on mere human reasoning. I received my message from no human source, and no one taught me. Instead, I received it by direct revelation from Jesus Christ.

We know Paul’s unique experience gave him distinctive authority and insight. But he learnt other matters, such as the life of Christ from others.

Galatians 1:18
Then three years later I went to Jerusalem to get to know Peter, and I stayed with him for fifteen days. The only other apostles I met at that time was James, the Lord’s brother. I declare before God that what I am writing to you is not a lie.

Meaning the information that Paul had about Jesus Christ was not only personal but also included authentic information from those who were closest to Christ.

Galatians 2:1-3 even told us how Paul when back to Jerusalem 14 years later (better equipped) to met privately with those considered leaders of the church to share with them the message he had been preaching to the Gentiles. The leaders did not raise any opposition at all.

Why?

When the power of God that raised Jesus Christ from the death is working in you, mature Christians will recognise it.

Galatians 2:6-8
And the leaders of the church had nothing to add to what I was preaching. Instead, they saw that God had given me the responsibility of preaching the gospel to the Gentiles, just as he had given Peter the responsibility of preaching to the Jews. For the same God who worked thru Peter as the apostle to the Jews also worked thru me as the apostle to the Gentiles
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What a bold and confident speech!

Likewise brethren, a believer can say, the same power that worked in Peter and Paul, works also in me (WITH CONFIDENCE)

CONCLUSION

The power that raised Christ from the death works in you when you accepted Jesus Christ as your advocator before the throne of grace. As no one can stop the moon and sun to rise, no one can stop you too.

If the world ever tries to hinder you by saying by what authority do you preach?  Say this to THEM

2 Corin 4:5-7
You see, we don’t go around preaching about ourselves. We preach that Jesus Christ is Lord, and we ourselves are your servants for Jesus sake. For God, who said, “ Let there be light in the darkness.” has made this light shine in our hearts so we could know the glory of God that is seen in the face of Jesus Christ. We now have this light shining in our hearts, but we ourselves are like fragile clay jars containing this great treasure. This makes it clear that our great power is from God, not from ourselves.

I will say a big Hallelujah and Amen to that

God bless

The way to christian maturity is to study the writings Of the epistles . Especially apostle Pauls epistles. Jesus gave him the revelation of the church and the revelation of who the christian is. If a man must grow out of babyhood ,he must study the deep things in the epistles .

Joagbaje:

The way to christian maturity is to study the writings Of the epistles . Especially apostle Pauls epistles. Jesus gave him the revelation of the church and the revelation of who the christian is. If a man must grow out of babyhood ,he must study the deep things in the epistles .

Sure! A very good source into Christian maturity. The key for me is "Revelation" and "Insight" into the heart of God.

1 Tim 3:9 sheds some light on this for mature christians.

"They must be committted to the mystery of the faith now revealed and must live with a clear conscience"