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
I love RG. Today was kids day, but I skipped most of the exhibitions and walked 20 times around the venue to see who was practising where and with who.
The best practice was Pablo, with some guy I don't know. All the kids were asking his autograph. After 5 times he just gave up starting to explain he's a coach and not a player, and just gave them. So funny.