There is no free will in the mind
Formal Statement
In the mind there is no absolute or free will; the mind is determined to wish this or that by a cause, which has also been determined by another cause, and this last by another, and so on to infinity.
In Plain Language
Step 2 (df-02) denied free will in God; this step denies it in us. The mind is a definite mode of thinking — not a mysterious self-mover but a link in an infinite causal chain. Every volition is determined. The feeling that you "could have done otherwise" comes from inadequate self-knowledge: you know the outcome of your deliberation but not all the causes that produced it. This is not depressing — it is diagnostic. It tells us where to look for genuine freedom: not in uncaused willing, but elsewhere.
Why This Follows
Step 2 (df-02) removed free will from God. Step 8 (df-08) showed that the mind has adequate knowledge of God's necessary essence. Now Spinoza applies the conclusion directly to the human mind: since the mind is a mode of God and everything in God follows necessarily, the mind itself is determined. The anti-voluntarist thesis is secured from both the cosmic and the human side.
The denial of free will is now established for both God and the human mind.
If there is no free will in the mind, can Spinoza still meaningfully distinguish between a person who acts wisely and one who acts foolishly?