What do they mean? Well, I won’t tell you.
At least I won’t say what they stand for in my mind as I believe that there is something special about creating something only you understand (yes, Tyler Joseph quotation intended!). However, that doesn’t mean that these lines couldn’t mean something to you too, it’ll simply be something different. It’s kind of similar to words and stories when you think about it; we don’t all connect the same meanings with the same things, even if they may appear similarly to the eye.
Then.... why am I posting it? Simply because these lines have been a guideline for me over the past three years of school WHICH I’VE NOW FINISHED!!! No school for me anymore :D