Robin Williams: wisecracks and wisdom

"Nanu Nanu" -- Williams' extra-terrestrial greeting from hit television show "Mork & Mindy"

"Cocaine is God's way of telling you you are making too much money." -- Williams on the perils of substance abuse.

"A woman would never make a nuclear bomb. They would never make a weapon that kills, no, no. They'd make a weapon that makes you feel bad for a while." -- Williams on the battle of the sexes.

"You're only given one little spark of madness. You mustn't lose it." -- Williams explains his comic style.

"Most of all, I want to thank my father, up there, the man who when I said I wanted to be an actor, he said, 'Wonderful. Just have a back-up profession like welding.'" -- Williams pays tribute to his father in his 1998 Oscar acceptance speech for "Good Will Hunting".

"I went to rehab in wine country just to keep my options open." -- Williams jokes about his stint in rehab.

"You're not perfect, sport. And let me save you the suspense, this girl you've met, she's not perfect either. The question is whether or not you are perfect for each other." -- Williams' character Sean Maguire offers relationship advice in "Good Will Hunting".

"It's all part and parcel of the whole genie gig: phenomenal cosmic powers, itty bitty living space." -- Williams as the Genie of the Lamp in Disney's 1992 hit "Aladdin."