32 Where, says he, shall we swear obedience to your Grace's laws and decrees? Does then your mind, which is contained in the laws, gain assent and bind to faithfulness by heathen ceremonies? The faith is attacked, not only of those who are present but also of those who are absent, and what is more, O Emperors, your faith, too, is attacked, for you compel if you command. Constantius of august memory, though not yet initiated in the sacred Mysteries, thought that he would be polluted if he saw that altar. He commanded it to be removed, he did not command it to be replaced. The removal has the authority of an act, the restoration has not that of a command.
Source: Letters (New Advent)