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[anagogy]

Do some of you knows precisely their life's mission, why they came here appart from
being a passive radiator of positive energy ?

I don't have a specific answer for you except to say whatever brings you the most satisfaction is your life purpose, and it could be literally anything. If you are filled with happiness, so much so that it is spilling out to the people around you, then I woulds say you've found your life purpose. We find satisfaction in certain things because we preincarnatively programmed ourselves to do so. Thus, we simply have to follow whatever interests us and the specific details will fill in over the course of time.