The Gunners, who beat West Ham on Tuesday night, saw their hopes of Champions League qualification receive a boost after Roberto Martinez's side saw their seven-match winning streak brought to an abrupt end by the Eagles, now safe in the Barclays Premier League for another season.
Wenger, though, insists there is still plenty of work ahead for his side, who travel to FA Cup final opponents Hull on Easter Sunday where they could have record signing Mesut Ozil available again following a hamstring injury.
"It is of course a big encouragement but there is a lot of work to do for us, and that's what we want to continue to do," said Wenger, whose side are a point ahead of the Toffees.
"We have a big game at Hull, we just want to prepare as well as we can for it.
"I think mentally we are in a better shape than a week ago, because we had two important wins, and that of course puts us in a better condition on the confidence front."
Arsenal's trip to Hull was rescheduled following the decision by the Premier League to move Chelsea's home game against Sunderland forward ahead of the Champions League semi-final first leg against Atletico Madrid.
The switch was berated by Gunners' fans, many of whom had already made travel plans for the original date of Saturday.
Wenger feels while the alteration "is not too disturbing" in terms of preparations, it leaves questions over just which fixtures can be changed, having seen Arsenal have to play at Manchester City on a Saturday lunchtime kick-off earlier this season soon after returning from a crunch Champions League game away to Napoli.
He said: "We never got any help on that front. Never.
"There is no written rule. When you speak to the Premier League, it is not the Premier League. It is the television companies who help, they decide who plays when and some clubs have maybe better introductions with television companies.
"We never had and we never tried to influence the decision of Sky or any other company.
"If you want to know more, you look at the teams who have been protected since the start of the season and the teams who had the biggest rest between games.
"You will see and you come to your own conclusions. I don't question the objectivity of the television companies, but sometimes their choices don't look very rational."
Wenger added: "If you want an objective view, I haven't made it - just make your analysis between Chelsea, Liverpool, Arsenal, Man City, Man United and all the other teams who play in the Champions League and you will come to your own conclusions."