We are what we pretend to be, so we must be careful what we pretend to be. Kurt Vonnegut
You have to be careful as a libertarian because you can sound very Republican. Penn Jillette
When you're in the editing room, the dangerous thing is that it becomes like telling a joke again and again and again. Eventually, the joke starts to not be funny. So you have to be careful that you're not throwing the baby out with the bath water. Ridley Scott
Time is the coin of your life. It is the only coin you have, and only you can determine how it will be spent. Be careful lest you let other people spend it for you. Carl Sandburg
Talent is God-given; be humble. Fame is man-given; be thankful. Conceit is self-given; be careful. Harvey Mackay