Apt analysis. Your infatuation with Borges conforms with my own.
However I would interpret it this way:
Spinoza was not wrong. You are a tiger made to act like a sheep. The sheep skin you don is society’s expectations of you, weighing you down, making you act a certain way. Eternally, you want to be a tiger like a stone wants to be a stone. You long to be Faust because you are Faust.