Maybe doing the right thing means recommending a product that will be tougher to sell than some other product, but you know it's the right thing to do, so you do it. Well, when you have enthusiasm, you can have that courage, that integrity. You can do what you have to do. Act enthusiastic and you'll be enthusiastic. In other words .
Nothing is as contagious as enthusiasm.
There used to be a popular advertising slogan when I was growing up in New York. So is enthusiasm, and if you don't have it, you can give it to yourself just by faking it for a while. The more enthusiastic you are, the more enthusiastic your prospect becomes. The more enthusiastic the prospect is, the more you become, and the more sales you will make. Enthusiasm is the cause of success, not the result.