This mystery is that through the gospel the Gentiles are heirs together with Israel, members together of one body, and sharers together in the promise in Christ Jesus.
NIV
[It is this:] that the Gentiles are now to be fellow heirs [with the Jews], members of the same body and joint partakers [sharing] in the same divine promise in Christ through [their acceptance of] the glad tidings (the Gospel).
AMP
That the Gentiles should be fellowheirs, and of the same body, and partakers of his promise in Christ by the gospel:
KJV
Surely you have heard about the administration of God's grace that was given to me for you
NIV
Assuming that you have heard of the stewardship of God's grace (His unmerited favor) that was entrusted to me [to dispense to you] for your benefit
AMP
If ye have heard of the dispensation of the grace of God which is given me to you-ward:
KJV
And with your feet fitted with the readiness that comes from the gospel of peace.
NIV
And having shod your feet in preparation [to face the enemy with the firm-footed stability, the promptness, and the readiness produced by the good news] of the Gospel of peace. [Isa. 52:7.]AMP
And your feet shod with the preparation of the gospel of peace;
KJV
I became a servant of this gospel by the gift of God's grace given me through the working of his power.
NIV
Of this [Gospel] I was made a minister according to the gift of God's free grace (undeserved favor) which was bestowed on me by the exercise (the working in all its effectiveness) of His power.
AMP
Whereof I was made a minister, according to the gift of the grace of God given unto me by the effectual working of his power.
KJV
In him and through faith in him we may approach God with freedom and confidence.
NIV
In Whom, because of our faith in Him, we dare to have the boldness (courage and confidence) of free access (an unreserved approach to God with freedom and without fear).
AMP
In whom we have boldness and access with confidence by the faith of him.
KJV
May have power, together with all the Lord's people, to grasp how wide and long and high and deep is the love of Christ
NIV
That you may have the power and be strong to apprehend and grasp with all the saints [God's devoted people, the experience of that love] what is the breadth and length and height and depth [of it]AMP
May be able to comprehend with all saints what is the breadth, and length, and depth, and height;
KJV