Are you 100% sure that if you died right now that you would go to heaven?
The Bible says you can know that you have eternal life.
These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life,
and that ye may believe on the name of the Son of God.
First, admit that you (as all of us) have sinned.
For all have sinned, and come short of the glory of God.
Second, recognize that the price of our sin is death and hell.
For the wages of sin is death.
Third, understand that eternal life is a free gift from God.
This gift cannot be earned and it is available to you if you will receive the Lord Jesus Christ as your personal Savior. Salvation is not in the church, religion, or good works, but in Jesus Christ alone!
But the gift of God is eternal life through Jesus Christ our Lord.
Finally, call on the Lord in prayer and by faith ask Him to save you!
That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation...For whosoever shall call upon the name of the Lord shall be saved.
Right now, bow your head and repeat this prayer to God, sincerely meaning it in your heart.
Dear God, I admit that I'm a sinner and I deserve to pay for my sins. I believe that Jesus died for me, and right now I receive the Lord Jesus into my heart as my personal Savior. Take away my sin and take me to Heaven when I die. In Jesus' name, Amen.