Is the Pope's Word the Word of the Catholic Church?

I don't understand really how the law of Catholicism works as far as the Pope goes. I think they're very careful about kind of undoing stuff that other popes have done because you know that's ultimately pretty ridiculous. The pope is supposed to be the mouthpiece of God. So when the pope says something like this from a religious point of view it's supposed to be what God wants. Maybe politically I don't think legally I think the pope's word is the word of the Catholic church basically. That's powerful indeed.