"I promise never to reveal the secret of any illusion unto the laity, unless one swears to maintain the Magician's Oath in turn. I promise never to execute any illusion for any layperson without practicing the effect before I could do it well enough to maintain the illusion of magic."

When you are devoted to learning, understanding, and mastering the magical arts, then you proudly stand and utter the above Magician's Oath.