Confidence is what makes it happen in the deer woods.
Confidence in you stand location.
Confidence in your equipment.
Confidence in your camo.
Confidence in your shot making ability.
I could go on, but you get the idea.

I guarantee it plays a huge part in how successful a hunter is. If you are confident in your spot. You will sit still and scan the woods for movement and see more deer than if you don't believe a deer will ever show up.