Read my article about “How to evaluate a horoscope” which gives the answer to your question. Self Analysis% strength is the average potency of the house and Naked strength is the minimum below which it will never go during the entire period of life.
Your last sentence is tantamount to going for a medical lab test like to check your sugar levels and telling them to give a report only if it is good since otherwise you will be hurt and therefore does not want to know about it.