For we don’t have infinite knowledge, we as humans constantly share our experiences and views with each other. That’s how we’ve been able to get here, improving upon things and ideas that were not fully developed or not as they could be.
Every now and then, our paths cross with a great idea that can make our lives dramatically better. Additionally, as you ponder on many lives who are different than yours, you see that there are many good ways to live a blissful life.
But to find the right answer for yourself, you need to solve for X. You need to know what you believe in. If you believe in the afterlife, then your way of living is going to be at least somewhat different than a person who believes that when you die, you’re done, you’re gone for good, or a person who believes in reincarnation.