Ever done this? If you have teenagers, I guarantee it! The eternal "why" and the search for understanding is part of what makes us human. We start out with questions of origin, consider morality, followed by the meaning of life and finally, eternal destiny. Philosophers call it our "world view", but I just call it growing up. We begin with ourselves and end with God; simple. Consider the greatest thinker of all time: Solomon.
Ecc 12:8 Vanity of vanities saith the preacher; all is vanity.
Ecc 12:9 And moreover, because the preacher was wise, he still taught the people knowledge: yes, he gave good heed, and sought out, and set in order many proverbs.
Ecc 12:10 The preacher sought to find out acceptable words: and that which was written was upright, even words of truth.
Ecc 12:11 The words of the wise are as goads, and as nails fastened by the masters of assemblies, which are given from one shepherd.
Ecc 12:12 And further, by these, my son, be admonished: of making many books there is no end; and much study is a weariness of the flesh.
Ecc 12:13 Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this is the whole duty of man.
Ecc 12:14 For God will bring every work into judgment, with every secret thing, whether it is good, or whether it is evil.
No matter how smart you are, I guarantee there is someone smarter. You may have to look for a long time, but sooner or later.... bamm, you are humbled. It is very good to learn and to consider one's condition in the light of God's word is wisdom. If, after much reflection you think you know yourself very well, then wait, tomorrow you will change again. Solomon summed it up succinctly in the last two verses of the book, consider what God wants you to do and do it; there will be a test.... judgment day.