In my native language they say:
A L' E' INUTIL INSEGNA' AL MUS, SI PIART TIMP E IN PLUI SI INFASTIDIS LA BESTIE!!
(translated) There is no gain in teaching the donkey, you waste your time and annoy the beast
This is a black hole. It consumes matter, sucks it in and crushes it beyond existence.
When I first heard of that, I thought, thats evil at its more pure.
Something that drags you in, crushes you, makes you nothing.