A group needs only two things to be a tribe: a shared interest and a way to communicate. - Seth Godin

The reason it's difficult to learn something new is that it will change you into someone who disagrees with the person you used to be.

The purity of the message makes it even more remarkable. It’s easy to tell someone about the Leaning Tower. Much harder to tell them about the Pantheon in Rome. So, even though the Pantheon is beautiful, breathtaking, and important, it sees 1 percent of the crowds that the harder-to-get-to Tower in Pisa gets.

The Dip creates scarcity; scarcity creates value