The preaching of the Gospel and the preaching of the Cross are one and the same, 1 Cor 1:18
18 For the preaching of the cross is to them that perish foolishness; but unto us which are saved it is the power of God.
15 So, as much as in me is, I am ready to preach the gospel to you that are at Rome also.
16 For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
What does the Preaching of the Gospel, the Cross entails ? Its the scriptural setting forth of the Person and Work of the Lord Jesus Christ, the Messiah, the Son of God, Who He is, what He has done and for whom He did it. We cannot in Preaching the Gospel divide who Christ is, from what He did, and for whom, so its imperative to highlight the extent of His death, with its attending benefits. The Gospel should set forth what Christs death for them He died, what it actually achieved for them, that being eternal redemption Heb 9:12
12 Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us.
By it being procured for us, it intends the application of it to us.
Meaning His redeeming death expiated our sins, purged them away Heb 1:3
3 Who being the brightness of his glory, and the express image of his person, and upholding all things by the word of his power, when he had by himself purged our sins, sat down on the right hand of the Majesty on high:
It for us rendered satisfaction to Gods Law and Justice, It destroys the power of the devil over us
It does away with the curse of the Law over us Gal 3:13
Applies to us the forgiveness of sins Eph 1:7
In whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace;
Paul preached to some the forgiveness of sins, having been led to them by the providence of God Acts 13:38
Be it known unto you therefore, men and brethren, that through this man is preached unto you the forgiveness of sins: