Congratulations ! The first step is to realize that there is a purpose .
Who am I , Where did I come from and where am I going ? These are not knew questions . They are the questions that have motivated people from the beginning of time . Many books : Bibles and philososphical ones are still being written about these very matters . Unfortunately the answer does exist in books or words . Books and words are like directionals or foot prints of those who've gone before us . The answer is in the realm of experience .
In fact what you are looking for , is also looking for you ! It lives within , inside you and has been there all along . Call it what you will , the words came after the experience .
All the great words left to us tell us the same thing and here are a few :
" Self - knowledge is the best form of knowledge : through it one attains immortality." - The Upanishads 1500 B.C.
" Wherever you go , go with all your heart ." - Confucious - 500 B.C.
" For where your treasure is , there also will be your heart ." - Luke 100 A.D
" Gamble everything for love , if you are a true human being ." - Rumi 1200
" Only in the heart can one experience the divine prescence of truth." - Kabir 1300
" We are put on this earth a little space , so that we can learn to endure the beams of love ." - William Blake 1800
" Life is a voyage that is homeward bound."- Herman Melville 1840
" I have walked the earth for thirty years and , out of gratitude , want to leave some souvenier ." - Vincent Van Gogh 1850
" Your vision will become clear , only when , you look into your heart . Who looks outside , dreams ; who looks within , awakens ." - Carl Jung 1900
" What is essential , is invisible to the eye. It is only with the heart that one can see rightly ." Antione St. Exupery 1930
" Love is wisdoms' law on earth ." - Ingmar Bergman 1950
" All journeys will end someday . Find the journey within and you may journey forever . " - Pren Rawat ( Maharaji ) 1999
The question is complicated but the answer is simple .
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Your question IS a very valid one and there is an answer , a very simple one , too .Good Luck 