All humans have mindsets and preconceptions that color what they hear and choose to pass on to others. There is a game played in human society where all stand in a circle and whisper a statement around the circle, one to another until the statement returns to the originator, who can scarcely recognize it for what it was when it left his lips. All humans have a limited ability to comprehend the totality of what they learn. A child hearing an explanation for how an airplane can fly, the air lift under the wings, could scarcely pass this information on to others or would do by inserting misconceptions. The concept grasped is the one relayed, not the concept given.
All humans reach a saturation point when given a great deal of information all at once.
Complex concepts often require many factors to be considered at once, and thus a human hearing all the factors may grasp the end results but not remember all the factors. Thus, when relaying this complex concept to others, they omit crucial factors so that the second party does not form the same end result in their mind. All humans, when listening to a prophet, pick and choose what they elect to hear. If the message is distressing, they select only those parts of the message that comfort. Just as the witnesses to an accident often recount vastly different interpretations of what occurred, just so the audience of a prophet retain surprisingly different summations of what was said.