These things I have written to you who believe in the name of the Son of God, that you may know that you have eternal life, and that you may continue to believe in the name of the Son of God. Verse 13 says these things were written that you may know that you have eternal life. Do not wait till you die to find out. You can and should know it now . For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord.
Eternal life is a gift.
It is in Christ Jesus. When you receive Him, you receive eternal life. For with the heart one believes to righteousness, and with the mouth confession is made to salvation. Jesus promised not to reject you. Do not worry about the devil stealing you away from Jesus.