Lyric discussion by KSOfm 

Cover art for Spiraling Shape lyrics by They Might Be Giants

i was going to bash a few (in my opinion) lacking interpretations here, but instead i just offer my own, rather short and sweet.

drugs.

you really can't know unless you try it yourself. often one of the most concrete memories you can hold on to while you're on your way up from a far-too-large dose is of that person who told you not to do it, or what their trip was like, or what it's was supposed to feel like when you take it. and then you're there, dropping through the void, wishing you hadn't taken it, wishing you'd listened to the people who'd told you not to. you wanted to know the unknowable, but only managed to journey far enough to pick up a few mental scars and a very vague image of something just beyond. someday, before they set of to discover it for themselves, your friends will ask what it felt like, what you saw. that unknowable is of course without description, but you offer your best: "it was like a spiraling shape..."