Nick's Cardinal Virtue

In the end of chapter III of The Great Gatsby Nick revealed his "cardinal virtue," which defines something about justice, prudence, temperance, and fortitude as said by Plato Aristotle. Anyway, Nick's cardinal virtue is "I am one of the few honest people that I have ever known." It sort of changes how we, the readers, see Nick because now we get a bigger glimpse as to how fake and big-mouthed everyone really is. It kind of exposes how almost everyone that Nick has met is someone who isn't true about themselves and to themselves and everyone else (no one is really honest). His idea is definitely supported by what we've read so far, including:

• how secretive and fake Tom is to his wife, Daisy
• how self-centered and selfish Daisy really is
• he was told that Daisy was a catholic which Nick personally knows is not true
• how dishonest Jordan Baker really is 

I don't think Nick is arrogant because from what I've witnessed, he's actually very true. He's humble, as hard as it seems to believe, and he really is the most honest person he's ever met and we the readers have met.