I think his body was confined somewhere like the time Tobirama himself took care of the corpse. And that be a very powerful shinobi whom has high proficiency in fuinjutsu, most likely Kakashi.
1) "We think too much and we feel to little" - If you think too much, then you will also learn to feel. These are two sides of the same coin, they are dependent on each other do not exist singly. Well, to begin with, you didn't mention to feel what or how exactly. Now this is when thoughts start to actually matter.
2) "What will my reflection show who I am inside?" - it's not about reflection ( and even if it is - you're probably attention-dependent or egoistic ), it's about being yourself and showing your true insides, feelings. It might be hard sometimes, but impossible. Besides, why would that even matter or why would you want it at all? I think that it's basically being narcissistic. No one cares about each other. Showing off and making up fuss is not necessary, unless you're doing it to your close friends/relatives.
3) "in my own wonderful dreamworld" - If you postpone dealing with your problems, then you might aswell end up in an empty reality. Harsh, but true. Unfortunately, no matter how much we all want it, staying in a dreamworld for too long or even all the time is not the right choice, because it will eventually bring unwanted aftermath. ( unless you're a room person )
4) "No one's gonna take me alive -
Time has come to make things
right - You and I must fight
for our rights - You and I
must fight to survive. " - Now this is just straightly taken from whatever it was taken from, I don't even know. I could agree, however, the time to make things right was always right ( except some certain specific situations ). Our minds, however, weren't, so that's why we were postponing dealing with our things.
5) "Working on my masterpiece" - No one cares
Also I'm trolling you.
Because you have to much vanilla shit in your profile.
^^this
Kishi ignored all dead bodies.
There should have been a massive effort to dispose of those dead bodies. Kishi just ignored that factor. There must have been thousands of dead bodies laying there rotting.
We see Nejis grave, assuming they brought his body back.
In war or massive natural calamity they dig a large pit and throw dead bodies and bury or cremate. It so to stop the spreading of diseases.