The Light Blues tasted glory at Hampden Stadium last May to secure their 34th Scottish Cup triumph, with their win over St. Johnstone in the previous round at McDiarmid Park marking their ninth successive domestic cup victory as they also shape up for the Viaplay Cup final at the national stadium later this month.
Speaking to the media ahead of Sunday's clash, Beale insists his side are motivated to maintain their grip on the Scottish Cup trophy this season: "It's massively important. We want to pay respect to how important it is to us as a club and the competition as well. It's a competition that we won after a number of years, and it's one of the trophies that we feel we can win again this year.
"There's a huge [motivation]. We're in one cup final and, by the end of the season, we like to think we can be in another one. The competition is really important for us. We're four wins away from a trophy, that's how we see it. We need to make sure that we perform to our best on Sunday to make sure we're one less game towards one.
"You never know how many years you have left in the game. Regardless of where you are in your career, we're a club that thinks we can win and get to cup finals. We have one to look forward to and we want to add another one, and ultimately when you get there you want to be picking up the trophy as well. It's relentless when you're at this club. Since I've came back, we've played 12 games and won 11. We have to keep winning."
The fixture is the first meeting between the two Glasgow clubs in five years, and Beale says the Light Blues must continue to raise the standards after securing a seventh consecutive victory with a 2-1 win over Ross County last time out.
He continued: "I look at Partick Thistle's squad and they have a lot of Scottish Premiership experience. I think it will be an interesting game. They're bringing 2,500 fans which shows the support that they've got. We just need to keep pushing our standards and not dropping from it in terms of our attitude and energy. I'm still looking for a greater level of performance, albeit at times we have played very well. I still want to push for more.
"It's quite nice. You play the same teams in the division three, sometimes four, times per season. Then if you draw them in the cup it can become a bit of a Groundhog Day because you know so much about each other and it can make for a stuffy game. It's nice to play a team who is not in our league, but also knowing that they have nothing to lose coming to Ibrox. I'm sure that's what Ian McCall will be telling his team, and we have everything to gain as well. It's important we play justice to the importance that it has for us at Rangers.”