What do I know?
Do you find that the more you learn about a topic, the more you realize that there is much more that you don't know?
There's an infinity to any subject.
You can cover much ground, but it seems that there is infinite ground left to cover.
Oh, and of the ground that you have covered, you can further splice and dice it ever more finely and deeply.
Oh boy, when does it end?!
No worries. Fortunately we have the ability to become effective experts in a domain. Experiencing and growing until we cease to be.
I shan't forget the bold statement from the infamous Socrates, recorded by Plato:
"I know that I know nothing"
... But also...
"I know virtually nothing, except a certain small subject – love (τῶν ἐρωτικῶν), although on this subject, I'm thought to be amazing (δεινός), better than anyone else, past or present."
I would argue that we all understand love.
Though we may not always understand our selves or one another.
Nevertheless, we are granted enough time and energy to embrace and blossom.
Now, what else is there? What else need be?