Partly because teenagers are still half children, and many children are just intrinsically cruel. - Paul Graham

Believe it or not, it's usually wise to walk investors through the risks involved in your startup. Investors know there's risk. If there wasn't, your valuation would be billions of dollars right now. And if you're vague about the risks you seem glib, or worse still, clueless.

To write good software you must simultaneously keep two opposing ideas in your head. You need the young hacker’s naive faith in his abilities, and at the same time the veteran’s skepticism. You have to be able to think how hard can it be? with one half of your brain while thinking it will never work with the other.

Addiction is where you go from something taking you from normal to good to it taking you from bad to normal.