"For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures"–1Cor. 15:3.
The gospel is not just that Christ died. The gospel is how that He died for us according to God's eternal and immutable decree, "the scriptures" (Acts 2:23: Rev. 13:8).
The scriptures declare that His death was appointed (Gen. 3:15; 22:8; Psa.22; Psa. 69; Matt. 16:21; Gal. 4:4).
The scriptures declare that His death was voluntary, He willingly laid down His life for us (Isa. 53:7; John 10:17-18).
The scriptures declare that His death was subtitutionary (Isa. 53:4-6; 2Cor.5:21; 1Pet.3:18 ).
The scriptures declare that His death was to accomplish definite atonement for His people (Isa.53:8; Matt. 1:21; John 10:15; Heb. 2:17).
The scriptures declare that His death satisfied all the demands of God's holy Law (Isa. 42:21; 53:10-12; Dan. 9:24).
The scriptures declare that His death was most effectual to put away all the sin of the covenant people (Psa. 103:12; Isa. 38;17; Micah 7:18-20; Heb.9:26; 10:17; 1John 1:7).
Every pledge of salvation has its accomplishment in the Lord Jesus Christ, "For all the promises of God in him are yea, and in him Amen, unto the glory of God by us (2Cor. 1:21). All that God has promised concerning salvation in Christ is certain and sure, "And being fully persuaded that, what he had promised, he was able also to perform." (Rom. 4:21).
John Gill said, "Every promise, type and prophecy recorded in the law, in the prophets, and in the Psalms, concerning His sufferings and death, had their fulfillment in Him; nothing was more clearly prefigured and foretold and nothing more punctually and fully answered."
Our Lord said, "But how then shall the scriptures be fulfilled, that thus it must be?" "But all this was done, that the scriptures of the prophets might be fulfilled." (Matt. 26:54,56), "It is finished" (John 19:30).
The apostle Paul said, "God forbid that I should glory, save in the cross of Christ" (Gal. 6:14).
I say, Amen!