A brace from Gary Hooper and a goal from Kris Commons secured the win for the Bhoys against rivals Rangers.
“I said before the game it’s not a defining point in the season but what it does do is give us an eight-point lead,” Lennon told Sky Sports.
“I know Rangers have games in hand but now we’re in control of our own destiny which we haven’t been in charge of for a while.
“I think psychologically it will give the club, the supporters and in particular the players a huge lift and it’s not done our goal difference any harm either.”
He added: “It was huge in the context of the season. The transition the teams have made over the course of the season – this was a real acid test of them today.
“That’s the calmest I’ve been in an Old Firm game because we were very much in control of the game for the majority of it. I thought we were fantastic today.”
“Samaras from start to finish was a real handful and I think Hooper, particularly in the first half, gave Rangers all sorts of problems,” he added.
“I’m delighted overall, it’s a clean sheet against a formidable team.
“The two centre-halves today were immaculate, an all-round great performance.
“You build from the back wherever you start. I felt at times the mentality of the team last year was weak. Now there’s a greater belief in the squad that they can go on and achieve something.”
