1 John 5:12-13
He who has the Son has life; he who does not have the Son of God does not have life. 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.
The Spirit himself testifies with our spirit that we are God's children.
"I tell you the truth, whoever hears my word and believes him who sent me has eternal life and will not be condemned; he has crossed over from death to life."
2 Corinthians 5:17
Therefore, if anyone is in Christ, he is a new creation; the old has gone, the new has come!
2 Timothy 1:12
That is why I am suffering as I am. Yet I am not ashamed, because I know whom I have believed, and am convinced that he is able to guard what I have entrusted to him for that day.