Everybody has a purpose on this Earth
Everybody has a purpose on this Earth. It may be difficult to identify or determine your purpose but whatever purpose you have you should use for helping people. Your purpose is generally those skills that you are really good at. So use those skills to identify and create fulfillment through utilizing your purpose.
— from The Flight Plan (Purpose/Wisdom/Risk)
In the book
"He who has a why to live can bear almost any how." — Nietzsche (Sample epigraph — or use one of your own; you said it plainly in, that everybody has a purpose on this earth, even when it is hard to find.) In the first part of this book we walked the whole shape of the flight — the certain landing, the chaotic takeoff, and the One who holds the sky. […] Nietzsche said it best — he who has a why to live can bear almost any how. Everybody has a purpose on this earth; it may be hard to identify, and harder to admit, but it is there. A life without one quietly curdles into meaninglessness — one of the largest problems I see anywhere is simply a lack of it. — The Flight Plan (Purpose/Wisdom/Risk)