"That game last week, the reality is that's what it's going to be like if we are to make something of our season, and plus some," said Kearney.
"I don't think we've played our best footy this year. We've got to find a way to be better and we've got real capability to do that.
"Every week is a challenge and as small as the margin is we weren't quite good enough last week. As I said after the game it was a really good lesson for us as a team and it's important that we take the lesson and move forward.
"I'm not worried about a clear break (on the ladder), our focus is on the challenge against Penrith and what we have to do to give ourselves an opportunity."
Veteran forward Simon Mannering insists the Warriors are not getting ahead of themselves and while satisfied with their efforts over the last month, believes there are aspects of their play that need urgent attention.
Lapses in concentration and poor execution cost them at critical stages against the Sharks and the Warriors need to show a more ruthless streak against the understrength Panthers.
"I don't think any of the guys are looking at the table," said Mannering.
"Over the last month we've been really consistent, we've done some really good stuff, but there's some stuff there that's been a bit patchy and we need to be better at.
"We're not the finished product and I don't think any team is. Coming down to within the last 10 weeks teams are going to be desperate and putting their best foot forward in every way to make sure they get better each week.
"We're just worrying about getting better each week and continuing to grow our game.