"The important thing today was that we tried to win throughout while Plymouth would have been happy with a point," Pearson said.
"We deserved our three points, although we weren't at our best.
"We nicked it late on, but that's the nature of football. I'm delighted for the players because their application was first class.
"The players have shown they are hungry for success. They are a group of talented players who are striving to be in a better place, whether we can achieve that success in the form of promotion remains to be seen."
It was a tough blow to take for Argyle boss Paul Sturrock.
"To get kicked in the teeth like we did at the end is hard to take," he said.
"It's so heart-rending when you've given so much. We stifled them for long periods and stuck to our game plan."
But Sturrock could still find positives from his side's performance.
"It's hard to take but there's definitely progress being made at the club. This is a difficult place to come but we could have gone home undefeated in four games," he added.
"How this will affect the player's minds, I don't know, because they work so hard but they are a young bunch and they are getting better."