This is an inspired definition of the GOSPEL.
But how do we OBEY the GOSPEL?
Those key words were: died, buried, raised, appeared.
Find them in this Romans 6 passage:
"1) What shall we say, then? Shall we go on sinning so that grace may increase? By no means! We died, to sin; how can we live in it any longer? Or don't you know that all of us who were baptized into Christ Jesus were baptized into his death? We were therefore buried, with him through baptism into death in order that, just as Christ was raised, from the dead through the glory of the Father, we too may live a new life. "