The only thing we can know is that we know nothing and that is the highest flight of human wisdom.
"The more you try to find the truth, the more you lose it."
The aim of proof is to understand, not just to verify.
To me, fearless is not the absence of fear. It's not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things, every single day.