Knowing a lot but being aware you know nothing is like level 4 of experience, where level 1 is being new and eager but knowing you know nothing yet, level 2 is

Knowing a lot but being aware you know nothing is like level 4 of experience, where level 1 is being new and eager but knowing you know nothing yet, level 2 is the "I am a god" stage, and level 3 is "I'm an idiot".