Wigan boss Roberto Martinez called on his players to "keep our dream alive" following what he described as the biggest month in the club's history.
Martinez spoke of his pride in his players but warned there is still much to do if Wigan are to stay up.
"April has been the biggest month our history," Martinez told BBC Sport.
"Playing against Manchester United, Arsenal and Newcastle - they've been in a terrific moment of form.
"We are very, very fortunate to be who we are in every department of the football club.
"The fans, chairman, directors, staff and players, we know we need to work really, really hard to keep our dream alive and that comes with belief.
"Sometimes you need to face real moments of adversity and we were very, very proud in the manner the crowd helped us through them periods and today they were no different."
Wigan know they must win their final two matches against already-relegated Wolves and fellow strugglers Blackburn Rovers to be certain of safety.
"Our aim is to stay in this league and we haven't got enough points, that's the reality," Martinez added.
"We've got another two big games, two big finals. We need to get as many points as we can. There will be surprising results and you can expect big performances.
"You're never safe with your aim, you need to get as many points as you can. Two games to go - we'll need to recover well and get ready for the next one."
Victor Moses scored twice against Newcastle, with Shaun Maloney and Franco di Santo completing the victory. Wigan have now taken 15 points from a possible 21.
"The difference today was that we took our chances," Martinez commented. "Since early February we had good levels of performance and played really well but you need to take your chances.
"Today we had belief, arrogance, call it what you like. Our finishing was outstanding. The first-half display was as good as against Manchester United - the team showed great maturity and it's a very strong clean sheet. At this stage of the season that's very important."
Striker Di Santo said the Wigan squad have not lost belief at any point this season, despite looking favourites for the drop for long periods.
"We always believed we were going to do it," he said. "Now on the pitch we are beating big teams and that gives us a lot of confidence.
"I am happy for the team, the fans and for me to score. It was very, very important for us to be safe. Not yet but every time we win we're closer."