Philippians 2:25-30

26. since he was longing for you all, and was distressed because you had heard he was sick.
27 For indeed he was sick almost to death, but God had mercy on him, and not only to him but on me also, lest I should have sorrow upon sorrow.
Questions: Why would Paul say that he should have sorrow upon sorrow?
Why should we be like Epaphroditus?

26. since he was longing for you all, and was distressed because you had heard he was sick.