The Toffees moved into the top four, just four points behind league leaders Arsenal, and Osman said that they have the quality to achieve something big this season.
"The team are very confident at the minute, we are playing well at times but we are not going to be able to be at our max every week. And when you can win when you are not at your best is great," the midfielder told the club's official website.
"At 1-0 we were just starting to find it difficult and their goal probably helped us more than it helped them.
"We have given ourselves a base, somewhere to go from and we can certainly turn this into a much better season."
Everton travel to Swansea City next in the Premier League.