Tebow doesn't really believe that...More information about Tebow is about to jump...Wait for it
The dude rarely even goes to church.lol
It is a good gimmick to have for sure if you can live with yourself selling lies like that. It is damaging though to society in the long run.
The NFL audience are easily played to and highly suggestible. The "Miracle" myth when it comes to sporting events flourishes. They can`t understand how a team that might be 0-13 will defeat a Super Bowl winning team that may be 13-0 so it has to be a miracle

of some sort, thus strengthening their already nonsense belief and notion.
In fact, this is part of the reason they watch sports. They want to justify that the seemingly impossible can happen so they can thus attribute it to a Supernatural cause. It emboldens their belief. There is a strong religious element and man worship to all of it. I find it quite interesting actually. A great study in mind control.