Amen decon, "Assurance of Salvation" is a proven doctrine of the Church; here are just a few verses in support of "Assurance of Salvation", from God's truth.
Assurance of Salvation
"The Spirit himself bears witness with our spirit that we are children of God,"
Romans 8:16
John 5:24 - "has eternal life"
Truly, truly, I say to you, whoever hears my word and believes him who sent me
'has eternal life'. He does not come into judgment, but has passed from death to life.
John 3:36 - "has eternal life"
Whoever believes in the Son '
has eternal life'; whoever does not obey the Son shall not see life, but the wrath of God remains on him.
Ephesians 2:8-9 - "have been saved"
For by grace you
'have been saved' through faith. And this is not your own doing; it is the gift of God, not a result of works, so that no one may boast.
John 10:28 - "never parish"
I give them eternal life, and they will
'never perish', and no one will snatch them out of my hand.
1 John 5:13 - "that you may "know" that you have "eternal life."
I write these things to you who believe in the name of the Son of God
'that you may know that you have eternal life."
Romans 8:1 - "no condemnation"
There is therefore now
'no condemnation' for those who are in Christ Jesus.
Romans 10:13 - "will be saved"
For “everyone who calls on the name of the Lord
'will be saved.”
John 3:16 - "have eternal life"
“For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but
'
have eternal life."
Romans 10:13-14 - "will be saved"
For
“everyone who calls on the name of the Lord will be saved.” How then will they call on him in whom they have not believed? And how are they to believe in him of whom they have never heard? And how are they to hear without someone preaching?
John 10:27-30 - "I give them eternal life"
My sheep hear my voice, and I know them, and they follow me.
'I give them eternal life', and they will never perish, and no one will snatch them out of my hand. My Father, who has given them to me, is greater than all, and no one is able to snatch them out of the Father's hand. I and the Father are one.”
John 6:37 - "I will never cast out"
All that the Father gives me will come to me, and whoever comes to me 'I will never cast out."
John 14:16 - our advocate
"The Holy Spirit", will be with us
"forever"
"And I will ask the Father, and he will give you another advocate to help you and
'be with you forever.
Romans 8:38-39 - "nothing will separate us from the love of God."
For I am sure that neither death nor life, nor angels nor rulers, nor things present nor things to come, nor powers, nor height nor depth, nor anything else in all creation, will be able
to separate us from the love of God in Christ Jesus our Lord.