I have always seen the human body as this you have the flesh the appearance of a person(Jesus) the spirit which holds our emotions and feelings our inner person or true selves ( holy spirit) and the mind which is the head and controls the rest of the body and is linked directly to our emotions and feelings ( the father) but I understand exactly what you mean when you say you have both a child and adult in you I have found this to be true in me as well especially when I am in his presence. Medition is something I have never been able to do though I would like to I suppose my meditation is just soaking in his presence I tried to breath and still myself clearing my mind of everything but I suppose I just don't have the ability for it.