Peace is used as a signal of the mind’s choice. If peace is disturbed, something has been perceived as sin—usually in a brother. The disturbance is not caused by the brother’s behavior; it comes from the judgment that turns behavior into guilt.

Specialness leaves the mind open to intrusions that destroy peace because specialness requires a verdict: someone is better, worse, chosen, rejected, safe, or dangerous. This section teaches a simple correction. When disturbance appears, look at the specialness-based judgment you are protecting and let it go. Peace returns as you choose sinlessness instead of a private verdict about guilt.

One of the most practical gifts in the Course is a reliable feedback system, and this occurrence uses peace as that system. Peace does not merely make you feel good; it tells you which teacher you are listening to. When peace is disturbed, the mind has accepted the ego’s interpretation—specifically, the belief that sin is present and therefore attack is justified.

The section locates the disturbance where it belongs: in the perceiver. That does not excuse behavior or erase consequences in form, but it clarifies content. Your loss of peace is not produced by another body’s actions; it is produced by your decision to see guilt as the truth of someone. Specialness makes this decision tempting because it depends on difference. To be special, someone must be less. To be safe, someone must be dangerous. Those verdicts invite intrusions—sudden fear, anger, jealousy, self-attack—because the mind has set itself up to be invaded by its own judgments.

Choosing sinlessness is the undoing. Sinlessness does not mean you approve of everything. It means you refuse to equate a person with guilt. You separate error from identity, and you allow correction without condemnation. In that shift, peace returns because the mind is no longer using attack as protection.

So the practice is immediate and honest: when you feel disturbed, do not ask, “What did they do to me?” Ask, “What sin have I assigned, and what specialness verdict am I defending?” As you release the verdict to the Holy Spirit, peace becomes possible again—not as a reward, but as the natural effect of withdrawing the belief that guilt is real.