The FA Cup winners return to Wembley to face Premier League champions Liverpool in the Community Shield.
Lacroix recalled: "I said that we were going to win the FA Cup before the season. I was praying and God told me, 'You're going to win a trophy.'
“I thought it was going to be the Carabao Cup, because we played against Arsenal in the quarter-final, but we lost and I was like: 'oh, we won't win a trophy!'
“But after, when I saw us win against Millwall, Fulham and Aston Villa, in the final, I was like: 'Okay, we're gonna win for sure.'"
He added, "We have a lot of people who have faith, but I think all the team were confident – and we played with this confidence," Lacroix revealed.
"You could see it in the fans in the stadium – everything was working.
"After that win against Villa, I was like, 'for sure we're going to win this trophy, for sure, for sure.'"