One thing I just want to clear that, I won't compare Prof Sahab with Joost, but want to know that Prof. Sahab passion and loves to know Allah, make him the blessed one and gifted with him with the knowledge of name. But how Gary be successful in his study to came up with the personality traits? One thing that you can say I am amazed about is his advice - the practical advice which might can solve 10-20% of problem (it's my assumption) of life. (Which really impact rest 90-80%) But the thing which I think of my self is that I really need Allah, as I won't be able to even balance my day so how I can balance my life. The things stated in the book is also about body area that might be effected - it seems how - how even he research that too, so accurately. Well, whenever I go through or read my part, I really ask Allah to help me to overcome my weakness (As if he- Allah won't change us, we won't be able to even think of it)