In principle he (Constantine) treated religion as a matter of choice and conscience, an arena free of state meddling...Liberis mentibus — "With Free minds" — all are to worship their Gods. It is a remarkable policy, an unexpected one, since it would have been natural for a ruler after his conversion to Christianity to shift all the previous relations. … Most of the apologists who defended the Church in the early centuries advocated freedom of religion...the latin rhetor Lactantius developed a theological arguement for religious freedom. Lactantius was close enough to Constantine later to serve as tutor to the emperor's sons, and his influence is evident in many ways in Constantine's own writings. …He (Lactantius) asked those who believed in compulsion of religion: "What good can you do, then, if you defile the body but cannot break the will?" It is a surprisingly modern statement, arguing, that religious freedom is the "first freedom", rooted in the very nature of religious life as an exercise of free will...Under Constantine's policy of concord, the Church was flooded with new converts, not through coercion but by force of Imperial example...Eventually, Christian Emperors abandoned Constantinian religious policy. ... Constantine favoured the Church but gave serious attention to protecting the rights of non-Christians. One cannot help but muse how European history would have been different if Christians had had the patience to let Constantine's original settlement alone.

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "In principle he (Constantine) treated religion as a matter of choice and conscience, an arena free of state meddling...Liberis mentibus — "With Free minds" — all are to worship their Gods. It is a remarkable policy, an unexpected one, since it would have been natural for a ruler after his conversion to Christianity to shift all the previous relations. … Most of the apologists who defended the Church in the early centuries advocated freedom of religion...the latin rhetor Lactantius developed a theological arguement for religious freedom. Lactantius was close enough to Constantine later to serve as tutor to the emperor's sons, and his influence is evident in many ways in Constantine's own writings. …He (Lactantius) asked those who believed in compulsion of religion: "What good can you do, then, if you defile the body but cannot break the will?" It is a surprisingly modern statement, arguing, that religious freedom is the "first freedom", rooted in the very nature of religious life as an exercise of free will...Under Constantine's policy of concord, the Church was flooded with new converts, not through coercion but by force of Imperial example...Eventually, Christian Emperors abandoned Constantinian religious policy. ... Constantine favoured the Church but gave serious attention to protecting the rights of non-Christians. One cannot help but muse how European history would have been different if Christians had had the patience to let Constantine's original settlement alone." in the context of "Peter J. Leithart, in Defending Constantine : The Twilight of an Empire and the Dawn of Christendom (2010)" to mean that wisdom is timeless.