The Perth side host Norwegian league leaders Rosenborg at McDiarmid Park tonight hoping to protect their cherished 1-0 lead from the first leg of the second qualifying round.
Frazer Wright bagged that crucial away goal in Trondheim but his managerial namesake still insists the visitors have touched down in Scotland as favourites to progress to a meeting with either Valletta of Malta or Belarusians FC Minsk.
However, the Northern Irishman claims the power of positive thinking could swing the tie in his side's favour.
He said: "It doesn't matter who you are playing, if you don't have any belief in what you are doing, in your team-mates beside you and in your own ability, then really you are beaten before you go out.
"Since we have come back we have tried to instil that in the players and give them confidence. To make them aware that they were going to be fit enough. It was irrelevant that it was their first game of the season.
"We have also showed them past results that we have had. We've gone to places like Hearts, Hibs and Celtic and got results.
"We're not asking them to do something that they are not capable of."
In order to march on in the competition, Saints will have to protect an unbeaten European home record that stretches back six games over 42 years.
But Wright is confident the pressure is all on the former Champions League quarter-finalists - claiming it will be ruinous for Per Joar Hansen's team if they fail to progress.
"It's advantage us in terms of the scoreline but in terms of the overall tie, I think they are still the favourites," Wright said. "It would be a disaster for them if they were to go out.
"But we can't go in gung-ho and get picked off or get carried away with the atmosphere and find ourselves two down in the space of five minutes.
"We are in the box seat because we don't have to chase the game. We can be disciplined. It will be the same for us from the first leg and it is up to them to come and chase the game."