Don't forget that few people are likely to tell more than a small part of the truth: no one tells much of the truth, let alone the whole truth. Spoken words are facts in themselves, whether true or false. When people talk they reveal themselves, whether they're lying or telling the truth.
You truly help people with the things that you sell. Once you are aware of that vital piece of information every demonstration, every presentation, every transaction will be delivered with a light shining from your heart. From your heart will shine a beacon that tells all prospects you can truly help and that that is your sole purpose for being there.