What you say can motivate people. It can inform or direct. It can build up or correct. It can encourage or discourage.
What you do can inspire. It can clarify. It can serve as an example. People learn from it.
But even more important, is the similitude between what you say and what you do.
When you say something, your actions sure as hell better match.
When there is discord …
… you lose trust
… you lose credibility
… you lose authority
… you lose allegiance
… you lose good people
… you lose friends
People forgive an occasional misstep. We all do it.
Just be aware that too many will lead to permanent loss of some pretty important things.