Another way of looking at the question is to try to intuitively describe the most "spiritual" person you know.
For me, I would describe this person as honest, humble, kind, generous, a teacher, has integrity, is courageous.
This person would be highly conscious of the role of their ego. They would see through the illusory veil it casts for us, to the truth beyond.
This person is a seeker of the truth. Spirituality is therefore the pursuit of truth.
Probably the chief quality necessary for such a pursuit is courage, followed by the willingness to be honest. The characterstics occuring as a result of this pursuit are humility, kindness, integrity and generosity.
Groan. I havent quite solved it. Science could also be said to be the pursuit of truth, though science is a purely rational affair. The human pursuit, on the other hand, entials the rational but is really more of an emotional affair demanding courage. I'm sure someone will be able to articulate this better than me...
