"MONSEIGNEUR,--A man must be void of all feeling who were not infinitely moved by the Letter which your Royal Highness has deigned to honor me with. My self-love is only too much flattered by it: but my love of Mankind, which I have always nourished in my heart, and which, I venture to say, forms the basis of my character, has given me a very much purer pleasure,--to see that there is, now in the world, a Prince who thinks as a man; a PHILOSOPHER Prince, who will make men happy. "Permit me to say, there is not a man on the earth but owes thanks for the care you take to cultivate by sound philosophy a soul that is born for command. Good kings there never were except those that had begun by seeking to instruct themselves; by knowing-good men from bad; by loving what was true, by detesting persecution and superstition. No Prince, persisting in such thoughts, but might bring back the golden age into his Countries! And why do so few Princes seek this glory? You feel it, Monseigneur, it is because they all think more of their Royalty than of Mankind. Precisely the reverse is your case:--and, unless, one day, the tumult of business and the wickedness of men alter so divine a character, you will be worshipped by your People, and loved by the whole world. Philosophers, worthy of the name, will flock to your States; thinkers will crowd round that throne, as the skilfulest artisans do to the city where their art is in request. The illustrious Queen Christina quitted her kingdom to go in search of the Arts; reign you, Monseigneur, and the Arts will come to seek you. "May you only never be disgusted with the Sciences by the quarrels of their Cultivators! A race of men no better than Courtiers; often enough as greedy, intriguing, false and cruel as these," and still more ridiculous in the mischief they do. "And how sad for mankind that the very Interpreters of Heaven's commandments, the Theologians, I mean, are sometimes the most dangerous of all! Professed messengers of the Divinity, yet men sometimes of obscure ideas and pernicious behavior; their soul blown out with mere darkness; full of gall and pride, in proportion as it is empty of truths. Every thinking being who is not of their opinion is an Atheist; and every King who does not favor them will be damned. Dangerous to the very throne; and yet intrinsically insignificant:" best way is, leave their big talk and them alone; speedy collapse will follow....