Delusions of Grandeur - a delusion that you are much greater and more powerful than you really are.
TNT Analyst and former Houston Rocket Kenny Smith has said that you have to delude yourself to win a championship.
He should know.
After the Rockets won their first championship in 94, they entered the following postseason with an abysmal 47 wins becoming the sixth seed in the West.
Most of us know how that played out as the Rockets, once again, became the eventual world champions.
At the time however, they suffered the type of debilitating losses in the playoffs that no team had ever come back from.
Miraculously, undeterred by nearly universal pronouncements of the team's fate, they became the first franchise to overcome both a 2-0 and 3-1 series deficit in a seven-game series.
Smith has stated on more than one occasion, that his teams delusional belief in themselves when all others doubted them, enabled the Rockets to do the seemingly impossible and eventually repeat.
So what of the coming NBA Season?
Many teams know their fate as evidenced by the brutally honest, if optimistic, full page ad issued in the papers by Timberwolves President David Khan.
Sobering, but realistic. Teams of this ilk (most in the NBA), will play to develop chemistry, play to improve.
But this is not about those teams. This is about the teams and their supporters who invariably will discover that they suffer from type of delusions for which many therapists would recommend treatment.