What assurance do the righteous have according to Scripture?

The Bible promises in Proverbs 10:30 that 'the righteous shall never be removed,' affirming the security of God's people in His grace. This assurance stems from theological truths such as the sealing of the Holy Spirit in Ephesians 1:13, which guarantees our inheritance until the day of redemption. The idea that we cannot be severed from God's family reinforces the doctrines of perseverance and assurance of salvation—key components of Reformed theology—ensuring that those truly justified will eternally remain in Christ's embrace.