He is most free from danger, who, even when safe, is on his guard.
Publilius Syrus (1st Centry BC-?) Roman writer and poet.
There is a significant Latin proverb; to wit: Who will guard the guards?
Josh Billings (1815-1885) American humorist and lecturer.
Be vigilant; guard your mind against negative thoughts.
Buddha (563 BC-483 BC) Founder of Buddhism.
They that are on their guard and appear ready to receive their adversaries, are in much less danger of being attacked than the supine, secure and negligent.
Benjamin Franklin (1706-1790) American statesman, scientist and philosopher.
Eternal vigilance is the price of liberty.
Thomas Jefferson (1743-1826) Third president of the United States.
There is nothing so much seduces reason from vigilance as the thought of passing life with an amiable woman in marriage.
Samuel Johnson (1709-1784) British author.