That's sad for you.
I've been in sales for 29 years and I can tell you for a fact that any salesman who expects to make a career in the industry had better be sincere about his product. If you can't believe in what you sell, go sell what you can believe in. You can live on lies for a short term, but they will all come back to bite you and you'll be run out of the business. I've seen it happen more times that I can count. The flim flam artists run up high totals in the short term, then word gets out and they're done. I only know of a couple of smooth liars that were able to survive. They went into management.