Not long ago, I took a simple Online Test that concluded that my personality type is INTJ. Subsequent introspection, besides confirming that I almost perfectly fit that stereotype (which was disappointing in itself since my emotional side would have preferred to believe that I was somehow special or unique), also led me to explore the consequences of the realization that I will eventually but inevitably no longer be who I am right now.
And that means that every thing I value right now, it may all be just a phase that I am going through. It may all be just a matter of time before I find flaws in the reasoning behind everything that I believe in. And if I don't, that doesn't necessarily mean that there are none. Now, it would have been a reasonable assumption that smarter men and women than I have struggled with the same problems and (factoring in the substantially more time and life experience they have had to think about this than I) would have proceeded beyond this point. But having explored the available answers to the philosophical questions that I obsess over, I already knew that none of the existing ones satisfy me.