I don't get what this has to do with Schrödinger's cat

I know this comment is a couple months old but, I'm replying anyway! Hehe
In Erwin's inner monologue he's talking about Levi always exceeding his expectations; "He's like a box you don't know the contents of until you open it" this being similar to not knowing whether the cat is alive or dead so can be considered both... I guess anyway ╮(￣ω￣;)╭

Thx for the reply, it helped ;)

I know this cement is a couple years old but, I just wanted to say hi (ﾉ◕ヮ◕)ﾉ*.✧