Labeling, arrested beliefs (often based on rationale and/or justification), working in generalization, reliance on cleverness are some of the things we as humans employ to "retard" our progress.
Humans are humans, that is as reasonably far as labeling can go without impeding. Accepting the similarities and differences of various belief processes/systems is our most reasonable path to prevent unnecessary conflict and overcome ignorance/fear. Generalizations are lazy efforts and cleverness makes up a humans' manipulations.
The human solution to 'retardation' our progress and understanding is to continuously be open and willing to learn, as there is no end to this process. In addition, becoming increasing aware of the hindrances listed prior and work to diminishing their prevalence in one's life-long existence.Connecting-to-the-Value-of-Why 2005-2008 ©