It sounds like the object of your focus is the pain. The problem with the analogy you've drawn is that the drill instructor is a totally impersonal, loveless figure.There is no love in this picture. Ask God to give you the grace to keep your focus on Him. This is all that's required.
It's a little hard to explain since it's first hand knowledge. Drill instructors don't hate you, they do care about you, even when it seems like they absolutely hate your guts, they are doing what they need to do to make you succeed, that is what they want, for you to succeed, and be prepared for a hostile environment where people DO hate your guts.
They have to be the bad guy.
It's kind of like a teacher to student relationship, with a scowling tough guy facade. Teachers do love their students, and have shown this by laying down their lives for their students in crisis.
So no, it's not loveless at all. It's just a tough love.
An event that helped me see through this facade is actually kind of a striking experience for me that I'll always remember. When I was in boot camp, they had 3 drill instructors (well we called them RDC's Recruit Division Commanders)... you had your positive, motivating leader, your cool calm and collected leader, and then your bad cop beats you yells at you and seems like he hates your guts leader. They work as a team to train you.
I got sick one morning, I woke up with chills (infections run rampant in that setting all those people close together, sleep deprived weakening the immune system etc), and went to sick call, got diagnosed with bronchitis and put on antibiotics and made SIQ (sick in quarters), when I got back, I got the red cross emergency message for me, it was delivered by the "Bad Cop" leader, but when he saw my face change when he notified me of the red cross emergency message and where to go.. he got compassionate. It was the first hint that the "bad cop" was all an act for training, but he actually did care, and that this same guy who whenever the "good cop" hyped up how good of a recruit I was, he'd always tear me down with an insult... actually did want me to succeed and cared about me.
It was a miserable day that day, just really rainy and dreary, I was sick, and I knew it was bad news like everything told me that. They had the message delivered by a chaplain (another way you just know it was bad news), my grandfather had died, so I was being recommended for emergency leave to go to the funeral. So when I got back, the 3 RDC's were arranging for me to go home for the funeral, then we had to go get more vaccinations, but because of my fever, they weren't giving me the vaccination and were going to cancel my plans to go home for the funeral.
It was the bad cop, the lowest ranked RDC out of the 3, that escorted a commissioned officer (well above his paygrade) into an office, closed the door, and through the blinds I could see him yelling at the officer, gesturing with his hands. He was fighting for me, advocating for me. The officer relented, and I was going to get to go home.
It was the bad cop RDC that helped me put on my dress uniform for the flight home, straightened out my neckerchief... it was.. fatherly. Even though he wasn't that much older than I was, he was only about 30 or so.
and I suppose I realize now, how much of a window that was into my relationship with God.
He tears me down when I become proud, He beats me when I disobey or don't do something exactly right, He trains me in the ways I should go with sternness, and He scowls at me instead of smiles most of the time. But He's also going to bat for me when it counts, advocating for me, shaking His fist in Satan's face when Satan's trying to take me somewhere I don't want to go using legalese.
... All that from an "impersonal" and "loveless" figure.
Sometimes it's odd how you can see the grace of Christ in completely unexpected scenarios and how things can seem so coincidental yet piece together so brilliantly and perfectly just to show you a facet of Christ in a tangent way.
if I hadn't gotten sick, on that specific day, I wouldn't have seen a guy I thought hated my guts advocating for me and showing that he really cared.