How do we know that God's work is perfect?

God’s work is deemed perfect because it stems from His intrinsic nature, which is just, true, and righteous. In John 17:4, Jesus affirmed, 'I have finished the work which Thou gavest me to do,' indicating that His redemptive mission was completed flawlessly. The perfection of God’s work ensures that all believers who trust in Him are accepted in the Beloved (Ephesians 1:6). This assurance reflects that the plan of salvation is wholly sufficient, affirming that not one of His children will be lost, as seen in Philippians 1:6, where it states, 'He who began a good work in you will carry it on to completion.'