Quote from : Thinkers of the East Book

Ali, Son of the Father of the Seeker Ali said: 'None may arrive at the Truth until he is able to think that the Path itself may be wrong. This is because those who can only believe that it must be right are not believers, but people who are incapable of thinking otherwise than they already think. Such people are not men at all. Like animals they must follow certain beliefs, and during this time they cannot learn. Because they cannot be called “humanity”, they cannot arrive at the Truth.