Thus Ussher distinguishes
“two distinct powers established by God in these lands, one of which is of the keys committed to the church, the other of the sword entrusted to the civil magistrate; the former ordained to operate about the internal man, having an immediate relation to the remission and retention of sins; the latter ordained to operate about the external man, affording protection to the obedient, and inflicting external punishments upon the rebellious”
A Speech Delivered in the Castle-Chamber at Dublin the xxii of November, Anno 1622, pp.304
Although in this way we make the prince and priest guardians of both tables, and although the matter about which they exercise their office can be the same, still the form and mode of governing in it is distinct in every way. One extends itself only to the external man, the other to the internal; one binds or looses the soul; the other attends to the body and things pertaining to it; one has a special regard to the judgment of the future world, the other refers to the present retention or privation of some of the conveniences of this life.
ibid., p. 6
James Ussher – Archbishop of Armagh (1580-1655) in a speech published with a controversial work against the Jesuit, Hybernus, defends the oath of fidelity which declared the king to be the sole supreme governor in the kingdom.
Both citations as found in Francis Turretin’s Institutes of Elenctic Theology, Vol. III, p. 322-323