It might come a time to not follow your passion, so to speak, although it must be prioritized. It may be the case that your passion will serve as the medic, your peace of mind, alongside a higher calling, with your higher calling being the point man.

No doctor knows everything. There's a reason why it's called "practising" medicine.

An infantryman’s job is to deliver his enemies into the waiting hands of Death. It is Doc’s job to protect his brothers from Death, to knock him aside and say, “Not today.