Godly Arrogance with Humility?

For The Love of God just finished 2 Samuel today and almost through Galatians.

2 Samuel 23:1-2
"These are the last words of David:
"The oracle of David son of Jesse,
the oracle of the man exalted by the Most High,
the man anointed by the God of Jacob,
Israel's singer of songs :

"The Spirit of the LORD spoke through me;
his word was on my tongue.

Galatians 1:1

"Paul, an apostle—sent not from men nor by man, but by Jesus Christ and God the Father, who raised him from the dead"

Galatians 1:12

"I did not receive it from any man, nor was I taught it; rather, I received it by revelation from Jesus Christ."

Galatians 1:15-16

"But when God, who set me apart from birth and called me by his grace, was pleased to reveal his Son in me so that I might preach him among the Gentiles..."

Galatians 2:7-9

"On the contrary, they saw that I had been entrusted with the task of preaching the gospel to the Gentiles, just as Peter had been to the Jews. For God, who was at work in the ministry of Peter as an apostle to the Jews, was also at work in my ministry as an apostle to the Gentiles. James, Peter and John, those reputed to be pillars, gave me and Barnabas the right hand of fellowship when they recognized the grace given to me."

To me it seems arrogant to claim to speak the word of God. Not that I think it arrogance from King David or the Apostle Paul, but I think it from me. Theologically (although there are differences) I know it is true for me too since we have the same Spirit. Practically I can't believe it. And that is where I find the difficulty.

How do I connect what God's word says with how I live? To have a "godly arrogance" knowing his Spirit speaks through me and his words are on my tounge, with humility knowing I do not always speak his words.

I understand it's a growing process. But I want to grow!