Here’s a quote from Wesley’s Notes on 2 Corinthians 5:17, which says if you are in Christ you are a new creature:
He has new life, new senses, new faculties, new affections, new appetites, new ideas and conceptions. His whole tenor of action and conversation is new, and he lives, as it were, in a new world. God, men, the whole creation, heaven, earth, and all therein, appear in a new light, and stand related to him in a new manner, since he was created anew in Christ Jesus.
The Gospel isn’t something you believe so when you die you go to heaven. You believe the Gospel so that right now, in this present world, you have new spiritual life that will extend throughout eternity.
The Gospel is life-changing, not just after-death-changing.