The purpose of our lives is the purpose God created us to fulfill. We are in this world to fulfill God's purpose for our lives. Everything that exists exists for the purpose for which it was created. There is no product that will be useful if it doesn't fulfill the purpose of Its creation.
Bro Eli Soriano explained to us that every other lower form of life was created to sustain human life. The plant exists to sustain human life. The crops and all what we get from the farm are for the purpose of supporting human life.
Now that we have come to the realization that the purpose of everything existing is to sustain human life, what would then be the purpose of human life? This is the greatest question which we must answer as humans.
From the Bible, we see that the purpose of human’s life is to do good works. We were created by God to do good works. We are his workmanship created unto good works. So, the purpose of our existence is to do good works which God has before ordained that we should work in them.