Suffer hardship with me (συνκακοπαθησον). See 2. Timothy 1:8 for this verb. The old preacher challenges the young one to share hardship with him for Christ.

As a good soldier (ος καλος στρατιωτης). Paul does not hesitate to use this military metaphor (this word only here for a servant of Christ) with which he is so familiar. He had already used the metaphor in 1. Corinthians 9:7; 2. Corinthians 10:3; 1. Timothy 1:18. In Philippians 2:25 he called Epaphroditus "my fellow-soldier" (συνστρατιωτην μου) as he did Archippus in Philemon 1:2.