My thoughts:
1. Nobody is ever bigger than the club.
2. Neymar frankly hasn't hit the level we expected at 25. One injury (he's not had many) and his sale will suddenly feel alot better.
3. The money quoted for him will give us the ability to invest not only in new players of a very high level, but into La Masia.
4. He's like an extremely hot girl you make your girlfriend, and then 6-12 months down the line you realise she's got more baggage than Heathrow Airport, and the intelligent thing to do is to let go because with time you'll realise how wise the decision was, even if it's hard to do at the time.
5. He'll be like this for the rest of his life, and will undoubtedly regret this situation he's caused.
6. Fighting with a team-mate is one thing, but storming out of training is just pure ignorance/it's all about me.
7. Sell.
8. Move on.