ELEUTHERII PAPAE RESGRIPTUM AD LUGIUM BRITANNIAE REGEM (QUOMODE GERERE SE DEBEAT IN REGNO BRITANNIAE)
PETIISTIS a noblis leges Romanas, et Caesaris vobis transmitti, quibus in regno Britanniae uti voluistis. Leges Romanas, et Caesaris semper reprobare possumus; legem Dei nequaquam. Suscepistis enim nuper miseratione Divina in regno Britanniae legem, et fidem Christi. Habetis penes vos in regno utramque paginam : ex illiis Dei gratia per consilium regni vestri sume legem, et per illam Dei patientia vestrum rege Britanniae regnum. Vicarius vero Dei estis in regno juxta prophetam regem 'Domini est terra et plenitudo ejus, oibis terrarum et universi, qui habitant in eo'; et rursum juxta prophetam regem 'Dilexisti justitiam et odisti iniqui-tatem, propterea unxit te, Deus, Deus tuus, oleo laetitiae prae confortibus tuis', et rursum juxta prophetam regem: 'Deus judicium tuum, &c.' Non enim dixit judicium, neque justitiam Caesaris.
Filii enim regis gentes Christianae et populi regni sunt, qui sub vestra protectione, et pace in regno degunt, et consistunt juxta Evangelium: 'Quemadmodum Gallint congregat pullos sub alis.' Gentes vero regni Britanniae et populi regni sunt; quos divisos debetis in unum ad concordiam, et pacem et ad fidem, et ad legem Christi, et ad Sanctum Ecclesiam congregare, revocare, fovere, manu tenere, protegere, tegere et ab injuriosis et malitiosis et ah inimicis semper defendere. Voe regno, cujus rex puer esty et cujus principes mane comedunt.' Non voco regem, propter parvam, et minimam aetatem sed propter stultitiam et iniquitatem, et insani-tatem juxta prophetam regem: 'Viri sanguinum, et dolosi non dimidiabunt dies suos, &c.', per comestionem intelligimus gulam, per gulam luxuriam, per luxuriam omni turpia et perversa et mala. Juxta Salomonem Regem, 'in malevolam animam non introibit sapientiae, nee habitabit in corpore subdito peccatis'. Rex dicitur a regendo, non a regno. Rex eris, dum bene regis; quod nisi feceris, nomen regis non in te constabit et nomen regis perdes: quod absit. Det vobis omnipotens Deus regnum Britanniae sic regere, ut possis cum eo regnare in aeternum, cujus vicarius estis in regno praedito ('Mansi', vol. i, p. 698).
Answer of the Pope Eleutherius to Lucius, King of Britain, concerning the way he should conduct himself in the kingdom of Britain:
"You have asked us to send you the Roman laws and those of Caesar, which you are anxious to use in the kingdom of Britain. We are always at liberty to reject the Roman laws and those of Caesar, not so the law of God. By the Divine mercy you have recently received this law and the faith of Christ in the kingdom of Britain. You have both parts in your power in the kingdom: from these by the grace of God, through the council of your kingdom select the law; and by this, in the patience of God, rule the kingdom of Britain. You are assuredly the deputy or vicar of God in your kingdom, for King David saith, 'The earth is the Lord's, and the fulness thereof, the round world and they that dwell therein'; arid again, 'I have loved righteousness and hated iniquity, therefore God, even thy God, hath anointed thee with the oil of gladness above thy fellows'; and yet again, 'Give the king Thy judgment, O God, and Thy righteousness to the king's son.' Certainly he does not say (any) judgment nor the justice of Caesar.
Assuredly the Christian peoples and nation of the kingdom are sons of the king. They are under your protection and live at peace in the kingdom, and remain (according to the Gospel) as the chickens gathered under your wings. Indeed, these are the people of the kingdom of Britain, and the nation of the kingdom whom, though separated, you ought to hold together, bound in concord arid peace to the faith and law of Christ and holy Church, to unite, to recall, to cherish, to hold in your hand, to protect, to shelter, and always to defend from wrongs and evils and enemies.
'Woe to the kingdom whose king is a child, and whose princes eat in the morning' (Eccles. 10:16). I do not call (such a man) a king, not on account of his youth and inexperience but on account of his folly and wickedness and unhealthy habits, for, as King David saith, 'The bloody and deceitful man shall not live out half his days', and we recognize that from over-eating comes gluttony, from gluttony, luxury, and from luxury all filthy, perverse and evil habits. Solomon the king saith, 'Into a malicious soul wisdom shall not enter, nor dwell in the body that is subject to sin.' A king is known by his government, not by his kingdom. While you govern well you will be a king: unless you do this, the name of king endures not and you lose the name of king: which (God) forbid.
God Almighty grant you so to reign in your kingdom of Britain, that you may reign with Him in eternity, whose vicar you are in the kingdom He hath given you." (Personal Trans.)