A 1-0 win at Everton sees the Gunners two points clear ahead of second-place Manchester City.
Arteta said, "What gives me belief and confidence is the level of performance and the consistency of that. That's very, very difficult to do in this league and that means that the team is constantly there.
"Enjoy the process of winning and you're going to have to go to difficult places, you're going to have difficult moments, we have dealt with a lot of things already and we are there. And what we're going to do is work for the next game, try to improve and make sure that everybody is with that spirit and energy and enjoying that."
On skipper Martin Odegaard's performance, Arteta added: "He was much more vertical as well. We found some spaces, we found him to have more vertical attacks as well the moment they started to get more aggressive in their press and in those moments we should have decided the game a bit earlier.