Try to figure it out

A notebook, that can change any rule in society if you so will it. You smirk. This is going to be fun.

Looking around Diagon Alley, you did not spot anyone you know. How sad. You thought about perhaps changing the rules for some of your friends, but since you saw none of them, perhaps you could satisfy yourself by messing with strangers. A rush of excitement filled you, as you pulled a quill from your pocket.

But wait a second... If you were to change anything, even the slightest thing, who knows what consequences it might bring. You thought for a moment and held the quill to your chin, thinking deeply about what you wanted to change. "Hmmm', you said, staring through your glasses and as if a literal light bulb went on above your head, a wonderful idea came to your mind. You wrote down. The glasses of Harry Potter grant him Xray vision. That must have been the most incredible smart thing, you have ever brought to paper. Not even Hermione would have thought of something better. You stared ahead, to the masses making their way through Diagon Alley. Many people went there, not just for school supplies. Old wizards bought all that they need in the shops around. You expected to maybe see people in underwear, or even better naked, but alas, you realized formulating a rule in the book seemed to be more complicated than you expected. You saw masses of skeletons walking around. You cringed; maybe a better formulation would have been better. You took off your glasses and immediately the people returned to their blurry clothed and fleshy ways. You sighed and put the glasses back on.

You crossed out the rule you wrote and immediately knew the glasses returned to normal. You thought again. "Maybe if I-", you began. "No, that would never properly work. But what if I-" You dipped the tip of your quill back into the ink and wrote. Harry Potter can see through clothes. You grinned. That has got to be perfect. You looked up again and sure, you saw, the nude bodies of all the people passing by, some looking suspiciously at you, who they presume was the boy who lived. Again however you were dissatisfied. You had to see the old wrinkly and disgusting bodies of all the old people around. You shuddered. This isn't going to work, no matter what you try. So you also crossout the rule. Again you thought hard about what to write. Writing good rules doesn't come easy, despite what others seemingly presume.

"Well then-", you said out loud, as you stood up. "This is leading me nowhere." You looked to your left and right and followed the street.