Nonsense, this is

"Fear is the path to the dark side. Fear leads to anger. Anger leads to hate. Hate leads to suffering." Not very coherent, Master Philosopher. Ah but wait a minute could it be that Yoda is actually channelling, of all people, David Hume? This, from A Treatise of Human Nature (1739): 'Grief and disappointment give rise to anger, anger to envy, envy to malice, and malice to grief again, until the whole circle be completed.'