A genuine faith that is based on actual reality helps in empowering you and makes you more confident.
On the other hand, when you, yourself, have not experienced the real truth and have built your faith based on a superficial fact, you are exploited by the delusion of that fact.
This way, you are not only misinterpreting the reality but is also keeping yourself bounded in a false faith. A superficial fact will keep you trapped in an artificial reality.
Thereby you should develop your confidence through faith and belief, which is based on your experience and not just an obscure superficial fact.