The French fullback says manager Sir Alex Ferguson never allows anyone to relax, even the most senior of players.
Evra said: "Playing for Manchester United demands huge sacrifices.
"It is a club for workers, and we are there to slog our guts out. There is no bling and sequins about the place.
"You bear the weight of the club's history on your shoulders, and you only become a true Red Devil once you understand this."