I read this in an Osho's book. Someone asks Osho how one should seek their guru. He replies, "You don't have to go looking for your guru, but the guru has to look for you. When the disciple is ready, the guru appears."
Now what I think is, when one is ready to learn -- when one is receptive to lessons -- he finds his lessons from pretty much anything. Guru and disciple are not two different entities, but the disciple has his guru in himself. Guru, and his teachings, all come from within the disciple. And that's why learning is always an intimate and personal experience.