We all have the purpose for which we were born. God has a purpose for our existence. We are living to fulfill a specific purpose. The purpose for which we are created is the purpose for our existence.
We are living for the purpose of God. God is our Creator. We cannot be living without any purpose. We cannot also be living outside the purpose of the one who created us. It is the one who created us that has the purpose for our existence. We are not living for ourselves, we are living for the one who created us.
The purpose of God for our lives is to do good works. That is what the Bible tells us. The Bible tells us that we were created to live and do good works. We are to show the love of God to our fellow humans. We are God's workmanship created unto good works. This is the purpose of our existence.