 Citizens have a duty to constrain their decisions by public reason only when they engage in certain political activities, usually when exercising powers of public office. So judges are bound by public reason when they issue their rulings, legislators should abide by public reason when speaking and voting in the legislature, and the executive and candidates for high office should respect public reason in their public pronouncements. Significantly, Rawls says that voters should also heed public reason when they vote. All of these activities are or support exercises of political power, so (by the liberal principle of legitimacy) all must be justifiable in terms that all citizens might reasonably endorse. However, citizens are not bound by any duties of public reason when they engage in other activities, for example when they worship in church, perform on stage, pursue scientific research, send letters to the editor, or talk politics around the dinner table.