a statistical observation that is markedly different in value from the others of the sample - Malcolm Gladwell

Those who are successful at creating social epidemics do not just do what they think is right. They deliberately test their intuitions.

We are all of us not merely liable to fear, we are also prone to be afraid of being afraid, and the conquering of fear produces exhilaration.…The contrast between the previous apprehension and the present relief and feeling of security promotes a self-confidence that is the very father and mother of courage.

There is a concept in cognitive psychology called the channel capacity, which refers to the amount of space in our brain for certain kinds of information.