A fool who knows he is a fool is for that very reason a wise man. The fool who thinks he is wise is the one to be called a fool.
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 that scare you to death.
The only way to do great work is to love what you do.