It is good that we know the purpose of our existence. The purpose of our existence is of great importance to us. There can't be a fulfilling life, if we don't know our purpose. Our purpose should be our focus and drive in life. It is very important that we seek to know our purpose in life. We should not live aimlessly. We should understand what God wants us to do. We should know why we were created.
The purpose of our existence is in the purpose of our Creator. We were created for a purpose. That purpose of our creation is what we should do. We should seek to understand what is the purpose of God for our lives. We are not living for ourselves. We are living for the one who created us. A product cannot exist for its own purpose. Any product is useful when it serves the purpose of its manufacturer. In the same way, we can't exist for our own purpose but for the purpose of our Creator.
The purpose of God can only be found in the word of God. When we study the Word of God, we will understand what the purpose of God is for our lives. We cannot understand the purpose of God outside the word of God.