The importance of reading guidelines.
When I was fresh from the chrysalis, I heard the tale of an elderly uncle, Dorian Dume.
He had come across a magical recipe. Using this, he could arrange for a portrait of himself to age while he stayed the same forever. Overexcited, he rushed the spell without reading the guidelines properly.
He messed it up and performed the spell the wrong way round. The picture stayed the same and he grew older. Many, it seems, have made this same mistake, judging by the plethora of portraits in galleries nowadays.
Let that be a cautionary tale to all. Guidelines are important.
If Uncle Dorian had read them properly, he wouldn't be dead now.