There are many reasons people are not able to hear what is being communicated. People, like my wife, who have severe hearing loss, have difficulty in being able to grasp was is being spoken. There are tools that may provide some assistance depending on the issue and severity they are dealing with, but still there is a good chance communication ability is diminished. Those who have challenges with their eye sight might find written communication more difficult than others. There are a kaleidoscope of various physical conditions which impact communication processes in some way.
What I would like you to consider is that, beyond physical reasons, there are also energetic awareness limitations which dramatically influence an individual’s ability to communicate effectively. Dr. David Hawkins in his book, Power vs. Force writes about a person’s energetic consciousness level impacting their ability to perceive, understand, and communicate. Individuals who are living out their life at an energetic awareness level below 200 face limitations and challenges to the quality of their life. What is interesting to consider is the emotional baggage connected with such a situation. The parallels to the Biblical position of bondage to sin and freedom from sin are interesting. I would encourage you to investigate what Dr. Hawkins has to say about this. I would add, your energetic awareness level might influence whether you do, or don’t, follow my suggestion.
The power of energetic awareness also potentially may be a factor in whether a person is open and receptive to the spiritual realm. Energetic consciousness (awareness) may provide insight into the Biblical concept of “hardness of heart” and whether someone is open to saying YES to a relationship with Jesus and to their level of commitment to such a relationship. It might also provide valuable insights into why there is a lack of unity within the faith community. There is much outside of the normal framework of thinking to consider in the process of communication.