assurance [uh-shoo r-uh ns, -shur-] : a positive declaration intended to give confidence
1 John 5:13
I write these things to you who believe in the name of the Son of God so that you may know that you have eternal life.
let us draw near to God with a sincere heart and with the full assurance that faith brings, having our hearts sprinkled to cleanse us from a guilty conscience and having our bodies washed with pure water.
1 John 1:9
If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness.
2 Timothy 1:12
That is why I am suffering as I am. Yet this is no cause for shame, because I know whom I have believed, and am convinced that he is able to guard what I have entrusted to him until that day.