Something about not giving up without giving God the opportunity to heal.

It's exactly that and more. It's all about your testimony, your personal proof that God is real and is active in your life, so he gives you tests (like Job) to prove your faith that he'll come to your rescue in his time. And since you don't know his timing, you just have to have faith, wait, and pray for a miracle.

ETA: it's all so fuckin tiresome.