7 If we have to consult concerning military affairs, the opinion of a man experienced in warfare should be waited for, and his counsel be followed; when the question concerns religion, think upon God. No one is injured because God is set before him. He keeps his own opinion. You do not compel a man against his will to worship what he dislikes. Let the same liberty be given to you, O Emperor, and let every one bear it with patience, if he cannot extort from the Emperor what he would take it ill if the Emperor desired to extort from him. A shuffling spirit is displeasing to the heathen themselves, for everyone ought freely to defend and maintain the faith and purpose of his own mind.
Source: Letters (New Advent)