The feeling that tells you that you are acting out of your free will is only the feeling that your desire is consonant with your action, but not that you are free to choose your desire, whatever that could mean, and which is, even so, not even considered. You might identify strongly with your desires but this is all the more so as you have no idea where they come from. With no other idols one might end up worshipping one's desires, or seeing them as a sacred gift, but consider that they are only a post-hoc alignment of mind with action. Or again, freedom as the ability to make a free response to some innovation - but this too is a mental artefact, since you have no way of knowing what that innovation is in itself - you only know as far as your ability to respond to it.