It is not because that our purpose that we exist but it is because of we are created for one. It's not the purpose that God has created us for a very specific purpose.

https://youtu.be/--URoQAbHR8?si=5eVWjnEytI5QGrfY

We are born to the concept of nobody apart from God. We didn't select where we are to be born. God put us in the right place for a specific purpose. It's not because of our purpose that we exist but because of the purpose that we have been created for.

We are God's creation so Christ has been giving us good works to do here on earth and we must abide with you. If you not do these good works then there is no longer purpose for your existence and your existence can be defeated. The purpose for existence is to do good and adhere to what is good.

Ecclesiastes also says that if a man begetted a hundred children and lived many years so that the days of his years be many and his soul be not filled with good and also that he have no barrier.

Even if you live for so many years and you cannot fulfill your purpose, an unborn child is better than you, so we must learn our main purpose here on earth and live according to it no matter what.