Once a person believes that something is true, (whether it is true or not) he then acts as if it were. He will instinctively seek to collect facts to support the belief no matter how false they may be. No one will be able to convince him otherwise unless, through person experience or study, he is ready to change.
Hence, it is easy to see that, if one accepts something that is not true, all subsequent actions and reactions will be based upon a false belief.
It may be astutely observed at this point that you and I are primarily the result of what we have been and I are primarily the result of what we have been told and taught, and what we have been sold and bought.
The average person never comes to near reaching his unlimited potential because he is living under the false assumption that he already knows the truth. He believes what his parents have told him, what his teachers have taught him, what he has read, and what his religion has told him without actually proving it for himself. Dehypnotize yourself.