Anyone who belongs to Christ is a new person!
The definition of unbelief is doubting or having skepticism especially in matters of religious faith.
The bible says, "That if you confess with your mouth, "Jesus is Lord," and believe in your heart that God raised him from the dead, you will be saved. For it is with your heart that you believe and are justified, and it is with your mouth that you confess and are saved." (Romans 10:9-10)
If you do not believe in your heart that Jesus is the Christ, Son of the Living God, your Lord and Savior, then you have no place in heaven. If you do not believe Jesus is God in the flesh, then you will die in your sins. No where in the bible will you see the unbelieving have a place in heaven. Jesus is the only way to heaven. All other paths lead to hell.
Jesus said, "Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. But small is the gate and narrow the road that leads to life, and only a few find it." (Matthew 7:13-14)
Following deceivers, many will travel the road to hell. Do not be an unbeliever, but listen to your heart. Jesus wants to lead you on the narrow road to heaven. This is the way that leads to eternal life.
Jesus said, "Therefore everyone who hears these words of mine and puts them into practice is like a wise man who built his house on the rock." (Matthew 7:24)
Jesus is the way, the truth, and the life.