Homer: What's the meaning of life?
God: I can't tell you that until you die.
Homer: OOH! I have to wait that long?
God: You can't wait six months?
The greatest episode was the one with Frank [Grimy] Grimes. That should be required viewing at every college graduation.
My top-five list goes back and forth every few minutes, but two stand out: the one about Homer becoming morbidly obese to go on disability, and the one where Homer goes to clown college.
And let's not forget "22 Short Films About Springfield."