Brian Tracy Quotes about Doubt
Fear and self-doubt have always been the greatest enemies of human potential.
Brian Tracy (2006). “The Psychology of Selling: How to Sell More, Easier, and Faster Than You Ever Thought Possible”, p.17, Thomas Nelson Inc
Brian Tracy (2008). “Eat That Frog!: 21 Great Ways to Stop Procrastinating and Get More Done in Less Time”, p.57, ReadHowYouWant.com