I visited the Greybeards and heard their explanation of the Thu'um. However, I must have missed something. They said that is the way the rest of us learn shouts. Okay, how did "the rest of" us learn shouts, exactly? I don't want to reload too far. If anything, I wonder if there is a site that will give me the full conversation.
This is the problem:
The Greybeards want to know whether I am really a Dragonborn. Well, not really me, I mean, my character. The way I show it to them is by shouting. Okay.
But then the rest of the Greybeards seem to know how to shout, too. Some don't even talk because their voice is "too strong," even for me. So Dragonborn are not the only one that can learn the shout.
How did they learn them?
Best Answer
A full explanation can be found on the Thu'um wikia page:
Thus, the origin of the Thu'um was when Paarthurnax betrayed the rest of the dragons and taught the humans how to speak their language. After the rebellion, humans, too, began to abuse the power this led to the creation of the Greybeards:
Essentially, Paarthurnax taught the humans how to use the Thu'um in order to defend themselves. After the Thu'um became abused by humans, the knowledge of how to use it was only passed down through the Greybeards and only as a method of prayer or self-defense. This is why only the Greybeards know how to do it.