But the Saints boss aims to keep the supporters on a high.
Lennon and the squad sat through an emotional viewing of the club's new cup final DVD, which chronicles their Hampden triumph against Hearts and the celebrations.
An estimated 15,000 people packed Paisley town centre to welcome the team back with the cup and Lennon hopes some of them help fill St Mirren Park for the visit of the Clydesdale Bank Premier League leaders.
And Lennon is determined to keep them coming back.
"We were just up at the launch of the DVD and we watched it together, the full group," Lennon told Press Association Sport.
"It was very emotional to see everyone and their love and affiliation of this football club - from the supporters, directors, to the players and families and friends.
"The supporters are the most important people at this club and if we manage to get that extra few through the gate on the back of this cup success, we'll be doing our damnedest to make sure we keep them here and we are only going to do that by giving them entertainment."
Lennon added: "We can't rest on our laurels. What we have to do is make that cup success a platform and continue our journey.
"We have eight very important league games to go. We are more points better off than this time last year but we are lower in the league. They are two very important aims for us."
- Sports & Recreation