A faith that cannot survive collision with the truth is not worth many regrets
Arthur C. Clarke.
One should be at pains to distinguish between faith and blind faith. In the majority of cases, particularly within the Catholic Church, faith is defined as something that one simply must have, whether one actually has it or not, because to not have it would be a falling down in ones religious duties, or even a sin. This is blind faith, a faith not tested by reality and unproven by experience. Blind faith is fixed, dogmatic, inflexible and often unrealistic.