The three tenets of the dragonborn mages are Control, Mastery, and Humility. Each tenet is critical to a mage's success in mastering the art of magic.
Control is paramount, for without it, a mage's power can become reckless and uncontrollable.
Mastery is the second tenet, for once a mage has achieved control over their powers, they must strive to master them. This requires years of study, practice, and discipline to achieve a level of mastery that allows them to push the limits of what is possible with magic. However, even the most skilled mage must be humble before the vastness of magic.
Humility is the third tenet, and it is necessary to avoid the hubris that can lead to catastrophe.
In this way, mastery beats control because a mage cannot achieve mastery without first achieving control. Humility beats mastery because no matter how skilled a mage becomes, they must always remain humble and recognize the vastness of the unknown. Control beats humility because without control, a mage's power can become reckless and uncontrollable.