Even so have these also now not believed, that through your mercy they also may obtain mercy.
 For God hath concluded them all in unbelief, that he might have mercy upon all.
Also note that Peter preached his message to Jews and Gentiles in Acts 2 (Acts 2:10, 39), but he did not know the mystery (Eph. 3:1-9, Acts 10, Acts 15, Gal. 2).
 And I thank Christ Jesus our Lord, who hath enabled me, for that he counted me faithful, putting me into the ministry;
 Who was before a blasphemer, and a persecutor, and injurious: but I obtained mercy, because I did it ignorantly in unbelief.
 And the grace of our Lord was exceeding abundant with faith and love which is in Christ Jesus.
 This is a faithful saying, and worthy of all acceptation, that Christ Jesus came into the world to save sinners; of whom I am chief.
 Howbeit for this cause I obtained mercy, that in me first Jesus Christ might shew forth all longsuffering, for a pattern to them which should hereafter believe on him to life everlasting.