The purpose of fear is to suppress awareness of the truth.
People always lie for the same reason: fear. But the precise fear that makes a person lie in one circumstance might be different from the fear that makes them lie in another.
For example, a mother will want to maintain a sense of herself as ‘a good mother’ (however dysfunctionalized and/or violent she is) and if one or more of her children decide to challenge her dysfunctional/violent behaviours or even to discontinue their relationship with her, then, rather than acknowledge her dysfunctional/violent behaviours and accept responsibility for dealing with these (which would require her to have the courage to feel the suppressed fear, pain, anger, sadness and other feelings that drive her dysfunctionalities and violence), she is most likely to reinforce her own delusions about herself by lying about herself and her child, including about the reasons her child no longer wants to have a relationship with her.
So why do most people believe lies?
Each child is born with a predisposition to believe the adults in its life. This is evolutionarily functional because childhood survival depends on adult care. But the child is also born with the potential to develop a ‘truth register’: the mental function, related to anger, that enables it to detect lies. Unfortunately, the truth register, like all potential capacities, is a subtle and easily damaged mental function and if a child is lied to chronically by a parent or other significant adult during its childhood, the truth register will either not develop or it will be weakened to such an extent that it will no longer readily detect lies.
A person who has been lied to chronically will develop a gullibility that is obvious to those with a developed truth register but even the gullibility of others will be obscure to those with an undeveloped or weakened truth register of their own.
What can we do about lying? Just four things will fix this chronic problem: always tell the truth fearlessly yourself, always believe children, always take affirmative action in response to the child’s truth, and never punish anyone (including whistleblowers like Bradley Manning and Edward Snowden) for telling the truth. See ‘Why Violence?’ http://tinyurl.com/whyviolence
You can run from the truth
You can hide from the truth
You can deny the truth
But you cannot destroy the truth