The Brazilian ace, 27, is on the brink of going back to Barcelona in a transfer worth more than £236million.
Evra believes he will be back at his best alongside Lionel Messi and Co.
The former left-back also said a lot of people "don't like" Neymar and that he needs to be around people who love him in Spain.
Evra said: "I think Neymar, there are a lot of people who don't like him.
"The problem in this world is that when you are yourself, people hate you, and when you lie, people love you.
"Neymar, I often speak with him and I wish that God would realise his plans.
"It's always like that, when you arrive you are the king of the world, and when you leave... looks like Neymar murdered someone. This is not the case.
"You'll see, people miss Neymar for his genius, his way of playing.
"It's simple, a football player must feel loved. When you feel too much negativity, you leave.
"There are people, and maybe even the media, who use that, who criticise him for diving too much during the games. They create all this hatred around him. But Neymar is a good guy. He gave a lot to Paris.
"And then I'll tell you, we're talking about Neymar, but when Neymar didn't play in the Champions League, Paris didn't go any further.
"Neymar was not there for the two semi-finals. Neymar is too important for PSG to lose him.
"I don't know if they're going to lose him, but if they do, they'll lose a great player.
"And if he does return to Barcelona he will become the player he always was."
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