Greetings!
One thing in life is that we humans are not here on earth for our own purpose, in fact, we are not here to fulfill our own purpose, but the purpose of the one who created us, which is God.
Aside from this, we humans must also know that we are only created for a purpose. This can be seen in the way we come to this earth, where we were not consulted before we were born. We humans didn't consent to our being or coming to the world when God was creating us, it's when we were being given birth to that we now come to have the knowledge of our existence.
Even, our creation is beyond our parents as in most cases, we were not what they'd wanted as sons and daughters as some of them wanted a boy, we have others looking for a girl child but were given the choice of God the creator.
So, this is beyond us and with this, our purpose in life is far far beyond us, as we can only operate in God's purpose and not our purpose as he'd only created us for a purpose.
In the book of Ephesians 2:10 For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them, we were made to know that we are his workmanship and that we are only created for a purpose which is to do good works.
So, the sole purpose of God for us is to do good and no matter what years we use on the planet earth, if we fail to do good work, then we have come to the world in vain, it's only when we do good works as commanded by our creator that we have fulfilled our purpose.
Also, in the book of Ecclesiastes 6:3 If a man beget an hundred children, and live 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 burial; I say, that an untimely birth is better than he, we were being told here in the scripture that no matter the numbers of years and children that we have, if we fail to do good, it's nothing as it would been better not to be born at all.
In conclusion, one thing we should know is that we only live to fulfill God's purpose for our lives and not our purpose and the use of the chair and its creator as an illustration in this special teaching summarized it all.
Thanks for reading.