The Pacers game was a textbook case of how having or not having confidence can sometimes determine the outcome of a game. The Nuggets didn't have much confidence in the 1st half, and got some back in the 2nd half. The Pacers are not good enough to beat the Nuggets even if the Nuggets don't have good schemes, so it came down mainly to confidence in this game.
The Nuggets should have won at least one of the home games against the Spurs in April, but one reason they didn't was that their confidence had been drained by the statements of the coaches that the team did not have enough mental toughness, whatever that is, to compete with the Spurs. This year again, the Nugget's confidence is coming and going like the wind, sometimes in the same game.
This is confidence in action: