I'm a hacker, I know how to hack people and I know how to recognize when people are being hacked.
I can hack you countless different ways and you won't know - you won't catch me.
Some people cannot believe a hacker can hack them in a way they can't figure how. But hackers can and hackers do. Don't be too sure of yourself, no matter how smart, or well prepared you think you are - you will be hacked.
-Adapted from the original words of the amazing James Randi