And the No.8 is desperate to remind his side they must continue the hard work that saw them down Ulster in the semi-finals if they are to have a chance in the Scottish capital against Connacht.
"Ospreys twice, Munster. I don't know if you guys have been into our gym but on the wall that we see every day, it covers all moments from Leinster. Good or bad," he said.
"The Ospreys one always catches my eye. 31-30. When they came back and caught us in the second-half.
"So like anything, you take your learnings from games like that. We're fully aware that whoever we come up against next week, it's a neutral ground, it's going to be tough. A final, semi-final, it's knockout rugby. You've been watching it long enough. It's the team that makes the fewest mistakes on the day that generally wins."
Jonathan Sexton had some harsh words for the Leinster squad after they were beaten 30-6 by Ulster near the end of the regular season.
But they turned on the style at the RDS last weekend to gain revenge and Heaslip knows that there is more to come from his side if they are to claim silverware at the end of the season.
"Johnny is a very emotional man," he added. "He wears his heart on his sleeve. And he says what he feels.
"I've been playing this game long enough. You shouldn't get carried away with the losses, or the wins. You can't go extreme. You need to waver somewhere in the middle and keep learning I suppose, keep evolving. That's what we're trying to do.
"Success just doesn't happen. You gotta work at it, day in, day out. You gotta live it. You basically got to commit to the professional life of a rugby player.
"I know there's a lot of lovely things that come with it. But there's a lot of stuff that comes with it which nobody sees. A lot of sacrifice, a lot of understanding from family and friends. Some lads just needed to see that."
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