How can a person know and understand his purpose on the world, on a general and individual level?
Answer:One can learn about the general purpose of man by studying well the sefer “Derech Hashem” and sefer “Daas Tevunos”. One can learn about hisher individual purpose by clarifying hisher personal powers, by way of learning about the elements of the soul [fire, water, wind, earth]. The more a person attains self-recognition, the better he can know his purpose. Clearly, a person [also] needs to daven a lot and cry to Hashem, for this. The more a person exerts himself “lishmah” [for non-ulterior motivations], the greater his clarity will increase about his purpose, for he will then touch upon his very havayah (existence).