"Cynicism is easy. Mimicry is easy. Optimistic contrarians are the rarest breed." 

- Naval Ravikant

"கற்றது கை மண் அளவு கல்லாதது உலகளவு" - 

Meaning: What one knows is only a handful, whereas the unknown is the size of the world.

— Avvaiyar (ஔவையார், ancient Tamil poetess)