Pulpit Magazine concludes its series on why we should pray if God is sovereign with part 4 here. The first three parts are linked here.
“5. We should pray because God has ordained prayer as a means by which He accomplishes His eternal purposes.”
This part is a little longer and more involved, but it is the crux of the whole thing. Go read it and think about it a while. Read the Bible passages that it points to and think about it some more.
here is one of the examples:
A second example can be found at the end of the book of Job. God addressed Job’s friend, Eliphaz the Temanite, saying,
I am angry with you and your two friends, because you have not spoken of me what is right, as my servant Job has. So now take seven bulls and seven rams and go to my servant Job and sacrifice a burnt offering for yourselves. My servant Job will pray for you, and I will accept his prayer and not deal with you according to your folly (Job 42:7b-8a; NIV)
Then, as verse 9 reveals, Eliphaz “did what the Lord told them; and the Lord accepted Job’s prayer” (NIV). From this it is clear that God not only ordained that His wrath toward Eliphaz would be turned aside, but He also ordained that the means He would use to accomplish that end would include the intercessory prayer of His servant Job.