What is the gospel? We heard it preached, received it, stand in it, and are saved by it! Jesus died for our sins, was buried, and rose again. We have not “believed in vain,” for we have obeyed it!

"Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received, and wherein ye stand; by which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain. For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; and that he was buried, and that he rose again the third day according to the scriptures:" - 1 Corinthians 15:1-4

How do we obey Christ’s death, burial, and resurrection?

"What shall we say then? Shall we continue in sin, that grace may abound? God forbid. How shall we, that are dead to sin, live any longer therein? Know ye not, that so many of us as were baptized into Jesus Christ were baptized into his death? Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life. For if we have been planted together in the likeness of his death, we shall be also in the likeness of his resurrection: knowing this, that our old man is crucified with him, that the body of sin might be destroyed, that henceforth we should not serve sin." - Romans 6:1-6 [Also: Colossians 2:11-12]

Repentance is death to sin. Water baptism in Jesus name is burial of old nature. Holy Ghost infilling is resurrection to new life.

"Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost." - Acts 2:38

The complete experience of the Gospel as in the Day of Pentecost!