What you (or a customer, or a partner, etc.) do is far more powerful than what you say. We know in marketing that the best form of marketing is a referral from someone who has actually used and can vouch for a product. In family situations, kids learn best not by being told what to do, but by watching their parents and siblings. I witnessed this first-hand by observing my niece (who is almost 2) learn new words and skills just by watching others!
In whatever you do, if you want to be at cause – that is to say, if you want to create a change in any part of your workplace or you personal life – take action and let those actions speak for themselves. People will also be more receptive to a new idea if they aren’t sold on it. Best let them learn from your example.