Probably of my favorite Adventure Time episodes.
Once again, Adventure Time writing dabbles in spirituality, eastern arts, Taoism and Buddhism. Xergiok, the previous despot of the goblin kingdom becomes enlightened after losing his eyes and his control over his kingdom.
This entire episode is an analogy to how we let our outer perceptions dictate our actions and use these external stimuli to evaluate our and other’s worth. When he lost his perceptions he abdicated his control (or more appropriately, his desires) and found true peace.
The fact that he was a monarch makes this analogy all the more powerful.