The best news to the Christian begins with, “But God…”
In Acts 26, Paul tells the arc of his story beginning as a Pharisee of the Pharisee (meaning he was well-versed in the law) but GOD interrupted his murderous persecution of Christians when He appeared to Paul in blinding light. Paul’s life changed 180 degrees when he realized Jesus is the Truth, the Way, and the Life. From then on, his singular focus would be speaking gospel truth to anyone who would listen.
There is a method of sharing your testimony called 2-Phase-2. As I understand it, you explain two things you were before, what changed in your life upon accepting Jesus as Lord and Savior, and two things that describe you now. Off the top of my head, I used to be cynical and self-centered–not that I’m not ever now but more so then–until I realized there is greater, bigger, and grander hope resting in God’s providence and a meaningful obedience in turning my thoughts toward Him, His majesty, power, and goodness. This comes experientially!
When the song “Alive” by the band Big Daddy Weave comes on, I throw my hands up when it reaches the chorus, “But God, rich in mercy..”
“But God, being rich in mercy, because of the great love with which he loved us, even when we were dead in our trespasses, made us alive together with Christ…” Ephesians 2:4-5