Theodore Roosevelt said this quote

Indeed, it is a sign of marked political weakness in anycommonwealth if the people tend to be carried away by mere oratory, if theytend to value words in and for themselves, as divorced from the deeds for whichthey are supposed to stand. The phrase-maker, the phrase-monger, the readytalker, however great his power, whose speech does not make for courage,sobriety, and right understanding, is simply a noxious element in the bodypolitic, and it speaks ill for the public if he has influence over them. To admirethe gift of oratory without regard to the moral quality behind the gift is to dowrong to the republic.