"Actions speak louder than words"
I strongly believe that actions speak louder than words. Because when a person does something everybody who is around will judge the results of the action and will connect the action to the person who did it.
One good example of it is a politician who is involved in a political scandal. Regardless the politician can prove his innocence, the most to the scandal, and maybe they won't support him in the next election process.
That's why the society are getting used to not believe in words, but in acts. Beacause actions are more difficult to do. The acts, always leave results and the results are the best example of the reliability of the acts.