Reason #16: They have an issue with God’s perspective.
Ephesians 1:6 tells us we have been “accepted in the Beloved”; in Christ. In Colossians 1:22, we find that God’s work in us has a goal “to present you holy, and blameless, and above reproach in His sight.” People who doubt their salvation have insecurities stemming from an incorrect view of how God sees them. They see Him as a taskmaster ready to beat them when they make a mistake rather than a redemptive heavenly Father.
People who do not doubt their salvation have a biblical view of God. That the Father sees us as children and fellow-believers in Christ and we are secure and gaining assurance in that perspective.