The Spirit itself beareth witness with our spirit, that we are the children of God:
38 For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come,
39 Nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.
In whom we have boldness and access with confidence by the faith of him.
2 Timothy 1:12
For the which cause I also suffer these things: nevertheless I am not ashamed: for I know whom I have believed, and am persuaded that he is able to keep that which I have committed unto him against that day.
11 And we desire that every one of you do shew the same diligence to the full assurance of hope unto the end:
19 Which hope we have as an anchor of the soul, both sure and stedfast, and which entereth into that within the veil;
1 John 3:14
We know that we have passed from death unto life, because we love the brethren. He that loveth not his brother abideth in death.
1 John 4:18
There is no fear in love; but perfect love casteth out fear: because fear hath torment. He that feareth is not made perfect in love.
Now faith is the substance of things hoped for, the evidence of things not seen
That their hearts might be comforted, being knit together in love, and unto all riches of the full assurance of understanding, to the acknowledgement of the mystery of God, and of the Father, and of Christ;
1 Thessalonians 1:5
For our gospel came not unto you in word only, but also in power, and in the Holy Ghost, and in much assurance; as ye know what manner of men we were among you for your sake.
1 John 5:13
These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God.
1 John 3:19
And hereby we know that we are of the truth, and shall assure our hearts before him.
And being fully persuaded that, what he had promised, he was able also to perform.
Epaphras, who is one of you, a servant of Christ, saluteth you, always labouring fervently for you in prayers, that ye may stand perfect and complete in all the will of God.