Pride Vs Benefits
"I can accept that you didn't change right now to fool the people in this town, but once we get out this town you should return to the correct height for your age, don't disobey your older sister. Seeing how you have flown before, you aren't able to fly without the help of wind skills. You seem to have a poor control of your bloodline, I will teach you to control it well and you will be able to fly as easy as you walk, but you need to listen to me. Furthermore, I see that Wyba is the opposite to you, she knows how to fly and how to use her bloodline will, but she can't use any wind skill to improve her flying abilities as you do; I will also help her to improve in that area."
Yale had an internal battle between his pride and the benefits of learning how to fly without skills.