Brian Tracy Quotes
Optimism is the one quality more associated with success and happiness than any other.
Citations
Tracy, Brian. Change Your Thinking, Change Your Life: How to Unlock Your Full Potential for Success and Achievement. John Wiley & Sons, 2003.
Related Quotes
Brian Tracy is a Canadian-American motivational public speaker and self-development author. He is the author of over eighty books that have been translated into dozens of languages. His popular books are Earn What You're Really Worth, Eat That Frog!, No Excuses! The Power of Self-Discipline and The Psychology of Achievement.