The Gospel is not according to man, but according to God, in fulfillment of His Purpose for all of the Election of Grace according to His Perfect Will:
Eph. 1:4-11
4 According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love:
5 Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will,
6 To the praise of the glory of his grace, wherein he hath made us accepted in the beloved.
7 In whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace;
8 Wherein he hath abounded toward us in all wisdom and prudence;
9 Having made known unto us the mystery of his will, according to his good pleasure which he hath purposed in himself:
10 That in the dispensation of the fulness of times he might gather together in one all things in Christ, both which are in heaven, and which are on earth; even in him:
11 In whom also we have obtained an inheritance, being predestinated according to the purpose of him who worketh all things after the counsel of his own will
2 Tim. 1:9
Who hath saved us, and called us with an holy calling, not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus before the world began
The GOSPEL OF GOD'S GRACE is defined in the acronym of T.U.L.I.P:
The Truths of TULIP:
Total Depravity and inability spiritually of the natural man
Unconditional Election of Grace of only a remnant out of mankind
Limited and particular atonement of only some out of mankind
Irresistible Grace or Effectual Call of only some out of mankind
Preservation or perseverance of the Saints to the end by God’s Power and Grace
These Truths in scripture present and define the method of God’s Saving Grace in Christ Jesus and therefore thoroughly present the Gospel of God’s Grace.
Acts 20:24:
But none of these things move me, neither count I my life dear unto myself, so that I might finish my course with joy, and the ministry, which I have received of the Lord Jesus, to testify the gospel of the grace of God.
And unbelief in any one of these Doctrinal Truths founded upon the Word of God is flat out unbelief and Apostasy!
Thankful to my Brother in Christ, beloved57, for sharing his intensive studies in his declaration of the True Gospel of God's Grace as declared by Paul, in relation to all God's Elect Sons / Children Eph. 1:3-11; 2 Tim. 1:9.
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