God's salvation is complete as it is accomplished through the finished work of Christ, ensuring that nothing can be added to it.
The assurance of complete salvation comes from understanding that Jesus Christ's sacrificial death on the cross was sufficient for the redemption of His people. As stated in the sermon, salvation is a finished work, established by grace without dependence on human effort. This echoes Romans 11, which illustrates that salvation is either fully of grace or entirely of works. If even a single work is added to the work of Christ, the entirety of salvation is undermined. The gospel proclaims that salvation, fully rooted in grace, is eternally secure for those whom Christ has redeemed, as expressed in John 10:28, 'No one can snatch them out of my hand.'
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