Most people are always striving to better themselves. It's the "Growth Mindset Way". For proof, check the sales figures on the number of self-improvement books sold each year. This is not a pitch for you to jump in and start selling these kinds of books, but it is an indication of people's awareness that in order to better themselves, they have to continue improving their personal selling abilities.
The Power of Knowledge and Confidence in Selling
To excel in any selling situation, you must have confidence, and confidence comes, first and foremost, from knowledge. You have to know and understand yourself and your goals. You have to recognize and accept your weaknesses as well as your special talents. This requires a kind of personal honesty that not everyone is capable of exercising.