Acts Theology 85: Mercy For Believers On Judgment Day

Paul's prayer in 2 Timothy 1:16-18, "May the Lord grant that he will find mercy from the Lord on that Day," for Onesiphorus, a presumed believer, raises questions about mercy for those already assured of salvation.
This prayer does not imply a lack of belief or assurance of heaven, but rather anticipates a form of judgment related to rewards for believers. Similar to 1 Corinthians 3:12-13, where Paul speaks of a 'Day' that will disclose and test each one's work by fire, this 'Day' in 2 Timothy refers to a time when believers' actions done in this life will be assessed. Paul is hoping that Onesiphorus's kindness and good works, performed on Paul's behalf and connected to the gospel, will be acknowledged and rewarded by God.
The practical takeaway is that while salvation is by grace through faith, our deeds as believers still matter. They are not a means to salvation, but a demonstration of our faith and a basis for divine reward or recognition in the age to come. This understanding encourages thoughtful living and service, knowing that every act of faithfulness, no matter how small, is seen and valued by God.