2 Timothy 1:18

The Lord grant unto him that he may find mercy of the Lord in that day: and in how many things he ministered unto me at Ephesus, thou knowest very well.

The verse stands within Paul's fatherly testimony and charge to Timothy, his son in the gospel. It recalls the genuine, unfeigned faith that first dwelt in Timothy's grandmother Lois and his mother Eunice. It reveals Paul as a father to the flock bearing the burden of his pupils' spiritual welfare, that they might know the true God and Jesus Christ whom He sent. It shows him praying with them and training Timothy from childhood in the knowledge of the Scriptures.

In that charge he urges Timothy to stir up the gift of God and to live not in fear but in power and love and a sound mind. He calls him to be unashamed of the testimony of the Lord and of Paul as His prisoner, and to share in the afflictions of the gospel. He charges him to hold fast sound teaching in faith and love in Christ Jesus and to guard what was entrusted to him by the Holy Spirit. The aim is that Timothy be not only a reader and teacher of the Word but a diligent student of it.

The verse itself is Paul's prayer that Onesiphorus may find mercy from the Lord on the future day of judgment. Onesiphorus had refreshed Paul and brought him comfort and cheer during his lonely imprisonment. He had faithfully, lovingly and courageously sought Paul out in Rome and in prison repeatedly, serving him faithfully. He was not ashamed of Paul's chains when others had deserted him. Paul's prayer for mercy in that day reflects his gratitude for that loyal care.