Your prospects do not BUY because of your sales presentation and what you say in it.
Your prospects subconsciously "read" your body language in the first 1 minute of meeting you and then they decide to buy from you or not, and they don't even know they're doing it. (If your sales presentation is 20 minutes long they decide in the first minute to buy or not and then they spend the next 19 minutes justifying their decision to themselves.)
Literally, you're telling your prospect 93% of what you're thinking by your body language, tone, timber, inflection and even the colors you wear...yep, colors affect your prospect.
When you lose sales the biggest reasons have nothing to do with sales, price, your offer or even your product, it has to do with...are you ready...it has to do with YOU and how they are "reading" you subconsciously.