Muscles without strength, friendship without trust, opinion without risk, change without aesthetics, age without values, food without nourishment, power without fairness, facts without rigor, degrees without erudition, militarism without fortitude, progress without civilization, complication without depth, fluency without content; these are the sins to remember.

Paul Krugman is a danger to society!

They will envy you for your success, your wealth, for your intelligence, for your looks, for your status - but rarely for your wisdom.

Failure saves lives. In the airline industry, every time a plane crashes the probability of the next crash is lowered by that.

Don't ask the barber whether you need a haircut, and don't ask an academic if what he does is relevant.

Never ask anyone for their opinion, forecast, or recommendation. Just ask them what they have—or don’t have—in their portfolio.

The opposite of fragile is something that gains from disorder.