Dearest John,
you need the adrenaline of war as much as I need the deductions and high-profile crimes. Even though I love the time we spend together, I always notice how much you are drawn back to the field just before your missions begin. You simply cannot do without. Just as I cannot do without my cases. I miss you endlessly. But who would I be if I wanted to stop you from following your destiny?
Please come back safely. I love you,
Sherlock