Clint

In High Plains Drifter  a woman tells the man with no name, played by Clint Eastwood, "Be careful.  You're a man that makes people afraid, and that's dangerous." and Clint replies with this:

"It's what people know about themselves inside that makes them afraid."

The Wisdom of Jerry Seinfeld

As Seen on Comedians In Cars Getting Coffee

On taking action:
"I do things when I'm not confident"
"Having confidence and faking confidence are the same thing."

On creating comedic stories:
Sneaking onto a film set of a kitchen with Gary Shandling, Jerry says something like this "We could make a sitcom right now!  All we need is an awkward situation."