Merlyn tells Wart before he is turned into a fish on page 46, "Education is experience and the essence of experience is self reliance." He is telling him that if he experiences something, he will learn from it. We chose the moat because this was the beginning of his education with Merlyn.
After meeting Mr. P, he teaches Wart a valuable lesson about power. On page 52, Mr P. states, "Power is of the individual mind but the mind's power is not enough. Power of the body decides everything in the end, and only might is right." We chose a king to represent this because kings have the most power.
As Wart's education with Merlyn continues, his want for learning new things increases. The quote on page 7, Merlyn tells Wart that "The time is not ripe for you to be a hawk." While knitting, Merlyn is telling Wart that sometimes he needs to be patient and wait for what he wants.