Barcelona have not lost a single of their nine matches so far this season.
“Barca play a very high level of football, but each day is different and no team is unbeatable,” Villa told the club’s official website.
“But we sense that the fans are excited. They know how much potential we’ve got and what we can do, but we are aware that it is only just starting.”
He added: “There are players here that have always been in the first 11. But there are more than 11 of us here and not everyone can play. Whoever plays, helps the team.
“Healthy competition leads to very positive things for the team. I try to do my job as well as possible whenever I get to play.”
