We've got lived endless lives in bondage. The bondage of attachment, abhorrence, anger, pride, deceit, greed, and so on. Due to this bondage we're stuck within the cycle of birth and death. The purpose of the human existence is to get ultimate liberation from this cycle. Ultimate liberation can best be attained after knowing the answer to the query, “who am I?” this puzzle can only be solved after the realization of the self. With the grace of the Gnani Purush (Spiritual Master) you can reap self realization and move forward in the path to liberation.
If one does not get the opportunity to attain the knowledge of the self, then the goal of life should be to apply the thoughts, speech and body to assist others. With the aid of giving what is yours to others you'll get greater happiness. It’s much like a tree, which never eats its very own culmination. As a substitute, others experience its wood, leaves, end result and flowers.
Happiness begins the moment you assist others. One can help others by donating to charity, giving nameless donations, or just by using making others glad. The law of nature is such that by means of giving happiness, one will be glad and by giving misery, one becomes depressing. The choice relies upon the individual.