assurance

1 Peter 1 

23 For you have been born again, 

but not to a life that will quickly end. 

Your new life will last forever 

because it comes from the eternal, living word of God. 

24 As the Scriptures say,

“People are like grass;
    their beauty is like a flower in the field.
The grass withers and the flower fades.
25     But the word of the Lord remains forever"

And that word is the Good News that was preached to you.