All talk and no show

 A lot of people say big things.

Claim and commit a lot.

Only to end up doing the exact opposite.

In my experience, those who talk a lot are the ones who are least reliable.

Because the way I see it is if you are someone who is capable of doing all these things you wouldn't be boasting about it, but rather those are the ones who worry more about delivering what they claim they can deliver rather than just talking about it.

No, I don't mean you should not be promoting yourself, you very well should be but committing less and delivering more is one of the golden rules of life, as compared to claiming more and delivering less than half of it.

You want your words to matter more, show it by implementing them as enthusiastically and with passion as you talk about it.