The idea of showing something rather than describing it (“telling”) is one that comes up in writing. It is far more engaging to demonstrate through the actions of the characters and generally, the story, what you mean than to talk about it.
The same goes for personal development and relationships. Don’t pay lip service to things you are not going to do. You will not build trust and confidence in others if you are someone who “talks a big game” and does not “walk the talk” (to use far too many metaphors).
Think of ways you live and embody that which you want to achieve and others will see it. They will trust you more because they can see you successfully doing it. It might not be perfect, but even less than perfect action will inspire you and others more than the words.