The Development of Intuition - HOW does one do this?

      The development of Intuition - In my case doing the Face Reading being intuitive about others came after years of practicing spiritual attunement and then bringing it down to the practical level for that client or that situation. 
      But what about people who have no interest in the spiritual life?
      To honor my twin brother, Mark, an amazing MD - He is not particularly interested in the spiritual life. However, his intuition is very sharp...It occurred to me tonight that how he developed it is by tuning in to higher principles or altruism for that particular situation - i.e.: what's the best for THIS patient? what's the right thing to do here?
     So  Intuition comes for some from their striving for spiritual attunement. For others, Intuition is developed by their aligning themselves to the the Greater Good for the situation.