Over 50,000 fans welcomed Neymar to the Nou Camp on Monday.
"Messi is a hero for me. He always has been, and he will continue to be. I have the opportunity to play at his side. I'm sure it will be a marvelous experience. I'm very happy to help him continue being happy," said Neymar.
"Both Xavi and Iniesta are two great players who I have always admired. I'm a fan of both of them."
He added: "They (Barca fans) will see a happy Neymar, daring and eager to win each and every game."