Human beings are social beings, living out each of their lives in the company and presence of others. There is no known claim that a person can live on his own without degrading himself less of a human being. Each person, being social as he is interacts with the people he comes into contact with.
The normal process of learning would be for each person to impart something, a thought, a practice, a belief, a philosophy, or the mere absence becomes the learning experience for the other to start seeking for answers to be properly integrated into the self.
Throughout the lifetime of a human being, he will be able to share himself and be shared with by others. The influences that subtly change a person into what he is during the present is what he got from coaching for life by those he had been with.
Coaching for life is quite simple to comprehend. It is the way an individual's personality having an effect with those people in his environment. The closer they are physically, and socially will probably have a greater impartment and thus would have a greater change in the attitude and behavior.
Though not necessarily impertinent in the sense that it overshadows another person's fundamental behavior, it deviates and shifts the behavior of a person. It becomes a two way process for the involved people, and a two way process to the individual.