Here are some of the things those voice might be saying?
"You don't deserve to be successful."
"What makes you think you deserve that?"
"It's not polite to talk about money with a stranger."
"Don't ask questions, that is too personal."
Those are just a few. Can you see how those voices could get in the way of closing a sale? Think about what internal dialog might be going on in your head. Become aware and once you are aware you must interrupt those conversations and change the words. Instead let the noise sound something like:
"I deserve success and it comes easily to me."
"People need what I have to sell so I will ask the right questions to help my clients."
"Questions are good, they help me understand what my client wants and needs."