Some modern day leaders are bombastically full of their own importance. This is not the case with Paul. One example is when he is writing his first letter to the church at Corinth.
In the first chapter of his first letter, he is repeatedly pointing to God and Christ. The first verse states who, Paul, is. But he qualifies it by saying that he is called to be an apostle of Christ Jesus by the will of God. He wishes them grace and peace from God our Father and the Lord Jesus Christ. He can speak no higher than that. In just the first verses he refers to God by name about a dozen times. The emphasis is where it belongs.