- I think reason of my existence is to achieve my purpose in my life. There are three main purposes to me. First purpose is as I&nbsp;mentioned at answer of what is science, i want to give motivation for next generation of people who don&#39;t have any ppurpose purpose in life. Seceond purpose is to make my family become happy by my existence and work. Third purpose is becoming one of the most proud and kindest person for my children and wife.</p>