And the decision to go back to sleep is not determined by our desire to go back to sleep? It must be, unless we go back to sleep unintentionally (without a conscious desire to go back to sleep). So it holds that our choice is determined by our desire or it is not determined by our desire (in which case the choice is unintentional). Either way, it is not free.
You’re confusing desire with intention. They aren’t the same thing at all, of course. I can look at a chocolate iced donut and DESIRE to eat it, but yet not actively form the INTENTION to eat it. I can look at some brussels sprouts and NOT desire to eat them, and yet actively form the INTENTION to eat them.
Of course there are times when I will follow neither my desire nor my intention. Say my desire is to sleep but I force myself to get up. But my intention isn’t just to get up - it’s to get up AND go for a run, remember. Let’s say I get up but DON’T go for a run, and do something else instead. In that case I’ve acted contrary to BOTH my desire AND my intention (at least partly).
Then his doing evil is determined by his desire, or it is not determined by his desire (in which case it is unintentional). Even though we say that we do not wish to do something evil we often do have a desire for that evil thing and that’s why we do it.
Ah, but that doesn’t mean we have the INTENTION to do that evil. Again, do you mean desire or do you mean intention? If we eat the donut then our desire is stronger than our intention. If we eat that brussels sprout our intention is stronger than our desire. So is our act equivalent to our desire? No, not always. Is it equivalent to our intention? Again, not always.
I have yet to be convinced that either desire or intention is so completely tied in with questions of will. We do a lot of things completely without conscious thought, or with very little consciousness going into them.
In that case we have two conflicting desires: a desire not to do the evil thing and a desire to do the evil thing, and our action will be determined by both desires, but the stronger desire will prevail (unless causes other than our desires make us do otherwise).
That’s the nub of it. There are so many more factors at play in our actions than simple desire or intention to do them. So often I won’t have the donut, say, simply because I don’t have any money in my purse at that moment with which to pay for it. Or won’t go for a run for mixed motives - because the weather’s slightly bad more so than out of any desire for sleep. Or eat the brussels sprouts, not because I have any real desire to eat them, but simply because if I don’t they’ll go to waste and I hate to see food wasted - in other words out of an unrelated desire to the actual act.
But one reason my will is free is that the possibilities are always manifold, and I don’t usually just have the simple option of ‘yes’ or ‘no’, with no inbetween. I might buy the donut and only have one bite. I might, as I said earlier, get up but not run, or go to the gym instead, or something. That multiplicity of choices at any given time means my behaviour is much less predetermined than you seem to think.
Then too, both our desires and intentions are often vague, including but not limited to our actions. My desire and intention might simply be ‘to get some exercise’, without me particularly caring or forming an intention as to the particular type, which may be determined as much by chance circumstances of the moment as anything. For example my eyes lighting on my skipping rope before they fall on my treadmill, which influences me to skip rather than use the treadmill for my exercise.