Crossword puzzle clue "advice to a young post if you want to succeed"

Advice to a young Post: "If you want to succeed, ___!"

Advice to a young Limbaugh: "If you want to succeed, ___!"

Advice to a young Gates: "If you want to succeed, ___!"

Advice to a young Knievel: "If you want to succeed, ___!"

Advice to a young Marceau: "If you want to succeed, ___!"

Advice to a young Carnegie: "If you want to succeed, ___!"

Advice to a young Schwarzenegger: "If you want to succceed, ___!"

“If you really want to hear about it, the first thing you’ll probably want to know is where I was born ...”