useless trivia: What Word Means: Guaiac?

Questions

"------------- is not a bad profession. If you succeed there are many rewards, if you disgrace yourself you can always write a book." - Ronald Reagan?

"Words make you think a thought. Music makes you feel a feeling. A song makes you feel a ---------."- E.Y. Harbug (1898 - 1981)?

"------------- is the art of preventing people from busying themselves with what is their own business."- Paul Valery?

"Words without ------- are like sails without wind."- Courier Record (Blackstone, Virginia)?

"Politics is war without bloodshed while war is politics with -----------."- Mao Zedong (1893-1976)?