“Whereof I am made a minister, according to the dispensation of God which is given to me for you, to fulfil the word of God” (Colossians 1:25).
The Lord Jesus Christ has entrusted Paul, “the apostle of the Gentiles” (Romans 11:13), with what the Bible calls “mystery” truth (Romans 16:25,26; 1 Corinthians 2:6-8; Ephesians 3:1-9; Colossians 1:23-29; et cetera). “Mystery” means God kept it hid in Himself until He revealed those secrets exclusively to Paul. Therefore, Paul is a very special servant (steward) of God in Scripture. Paul distributes to mankind—especially Christians, God’s people—what they need to know about God’s current dealings with them. Never forget it!
Sadly, in many local churches today, very little emphasis is placed on Pauline doctrine. His epistles, the 13 books of Romans through Philemon, are largely ignored. Whatever Scripture is read or expounded is usually from the “Old Testament,” especially the Four Gospels. Many church people are sincere when they say, “I follow Jesus’ words because He is our pattern.” Oh, but how they are so sincerely wrong!
Jesus’ earthly ministry is certainly God’s Word and work, but it was God’s Word and work before He revealed the mystery to the Apostle Paul! God has given us further revelation since Jesus’ earthly ministry. Even the Lord Himself, in John 16:12-14, predicted more Bible truth coming to Israel: “ I have yet many things to say unto you, but ye cannot bear them now.  Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.  He shall glorify me: for he shall receive of mine, and shall shew it unto you.”
In addition to more divine revelation concerning Israel’s prophetic program (the penning of the Books of Hebrews through Revelation), God would deliver to all of mankind some un-predicted doctrine (Paul’s epistles, Romans through Philemon). He would dispense some “household rules” for all nations to follow—“the dispensation of the grace of God” given to the Apostle Paul… source