A movement starts because of the social habits of friendship and the strong ties between close acquaintances. It grows because of the habits of a community, and the weak ties that hold neighborhoods and clans together. And it endures because a movement's leaders give participants new habits that create a fresh sense of identity and a feeling of ownership.
Charles DuhiggBetween calculated risk and reckless decision-making lies the dividing line between profit and loss.
Charles Duhigg