if you believe in a loving god who cares for you, then you'll recognize that
it's god's desire for you to be happy & healthy. to fulfill your 'mission' will
be to provide god with what is desired for you -- be happy & healthy.
i have a theory that things are happy when they are fulfilling their purpose.
given that premise, i reason that people can know themselves as functioning
properly when they sense themselves as being happy. soul-felt happiness
is the means to recognizing that the 'mission' is being completed. move in
the directions that provide happiness -- that's the mission. follow your bliss.