Abraham Lincoln said, "Most people are as happy as they've decided to be." It's about choosing. You decide everyday what your attitude will be.
Success in sales requires the combination of good technique, the right attitude and the execution of the right behaviors. Of all of these attitude is the most important.
As the saying goes, attitude not aptitude determines your altitude.
Everyday you start with the opportunity to choose happy or unhappy. Choose happiness and see what it does for you!