If a christian doubts their salvation, which God has promised to those who believe, should they expect to be saved?
OR is it the case that when a believer lacks assurance, they believe God's promise but aren't sure if they've truly believed (doubting themselves rather than doubting God's promise)?
I know nothing better than the Westminster Confession of Faith, Chapter 18, Of Assurance of Grace and Salvation I quoted it below what I want to say next.
Consider what John is saying in this verse.
1 John 5:13
These things have I written unto you that believe in 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.
Note that here John is addressing saints that "believe in the name of the Son of God." In other words,, True believers.
Note also that he is writing to them so they "may
know that ye have eternal life."
So true saving faith can exist in a saint while they still have some doubts or assurance that they truly belong to the Lord Jesus.
There is a far worse condition that has permeated Christian culture. It is a deadly sin abhorred by the Lord.
This is a false presumption that you have assurance when there are no grounds for believing this.
I ask your pardon for this poor hasty post. I am completely out of time to do this subject justice.
CHAPTER XVIII. Of Assurance of Grace and Salvation
ALTHOUGH hypocrites, and other unregenerate men, may vainly deceive themselves with false hopes and carnal presumptions of being in the favour of God and estate of salvation;a which hope of theirs shall perish;b yet such as truly believe in the Lord Jesus, and love him in sincerity, endeavouring to walk in all good conscience before him, may in this life be certainly assured that they are in the state of grace,c and may rejoice in the hope of the glory of God; which hope shall never make them ashamed.
II. This certainty is not a bare conjectural and probable persuasion, grounded upon a fallible hope;e but an infallible assurance of faith, founded upon the divine truth of the promises of salvation,f the inward evidence of those graces unto which these promises are made,g the testimony of the Spirit of adoption witnessing with our spirits that we are the children of God:h which Spirit is the earnest of our inheritance, whereby we are sealed to the day of redemption.
III. This infallible assurance doth not so belong to the essence of faith, but that a true believer may wait long, and conflict with many difficulties, before he be partaker of it:k yet, being enabled by the Spirit to know the things which are freely given him of God, he may, without extraordinary revelation, in the right use of ordinary means, attain there unto.l And therefore it is the duty of every one to give all diligence to make his calling and election sure;m that thereby his heart may be enlarged in peace and joy in the Holy Ghost, in love and thankfulness to God, and in strength and cheerfulness in the duties of obedience,n the proper fruits of this assurance: so far is it from inclining men to looseness.
IV. True believers may have the assurance of their salvation divers ways shaken, diminished, and intermitted; as, by negligence in preserving of it; by falling into some special sin, which woundeth the conscience, and grieveth the Spirit; by some sudden or vehement temptation; by God’s withdrawing the light of his countenance, and suffering even such as fear him to walk in darkness, and to have no light
yet are they never utterly destitute of that seed of God, and life of faith, that love of Christ and the brethren, that sincerity of heart and conscience of duty, out of which, by the operation of the Spirit, this assurance may in due time be revived,q and by the which, in the mean time, they are supported from utter despair.r
Westminster Assembly. (1851). The Westminster Confession of Faith: Edinburgh Edition (pp. 92–98). William S. Young.