Chrys,
Are you saying you don't know that it comes from I Tim 3:16? Or are you saying that the KJV is a bad trans?
The drift of Paul's thought there has nothing to do with how God has organized the ages, ie, before/after Christ. It has to do with pastoral challenges. So when the Dispensationalists popularized the expression RD, they once again showed that they look for sound bytes rather than the true, solid background.
So much for the Apostle Paul's own perspective - Time Past - But Now - The Ages to Come...
Ephesians 2:
11. Wherefore remember, that ye being in
time past Gentiles in the flesh, who are called Uncircumcision by that which is called the Circumcision in the flesh made by hands;
12. That
at that time ye were without Christ, being aliens from the commonwealth of Israel, and strangers from the covenants of promise, having no hope, and without God in the world:
13.
But now in Christ Jesus ye who sometimes were far off are made nigh by the blood of Christ.
7. That in
the ages to come he might shew the exceeding riches of his grace in his kindness toward us through Christ Jesus.
It is "Dispensational" in that Paul refers to his God-given perspective as to that as that "dispensation of [from] God... given me for you - Even the Mystery.
Colossians 1:
25. 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;
26. Even the mystery which hath been hid from
ages and from generations,
but now is made manifest to his saints:
There you have The Dispensation of the Mystery, whether your endless books supposedly based on Scripture, their very foundation, the lost man Josephus, subscribe to this or not.