It was during those ten years of rest and military preparation that Voltaire made his memorable visit--his third and last--to Potsdam and Berlin, thirty-two months of alternate triumph and humiliation. No literary man ever had so successful and brilliant a career as this fortunate and lauded Frenchman,--the oracle of all salons, the arbiter of literary fashions, a dictator in the realm of letters, with amazing fecundity of genius directed into all fields of labor; poet, historian, dramatist, and philosopher; writing books enough to load a cart, and all of them admired and extolled, all of them scattered over Europe, read by all nations; a marvellous worker, of unbounded wit and unexampled popularity, whose greatest literary merit was in the transcendent excellence of his style, for which chiefly he is immortal; a great artist, rather than an original and profound genius whose ideas form the basis of civilizations. The King of Prussia formed an ardent friendship for this king of letters, based on admiration rather than respect; invited him to his court, extolled and honored him, and lavished on him all that he could bestow, outside of political distinction. But no worldly friendship could stand such a test as both were subjected to, since they at last comprehended each other's character and designs. Voltaire perceived the tyranny, the ambition, the heartlessness, the egotism, and the exactions of his royal patron, and despised him while he flattered him; and Frederic on his part saw the hollowness, the meanness, the suspicion, the irritability, the pride, the insincerity, the tricks, the ingratitude, the baseness, the lies of his distinguished guest,--and their friendship ended in utter vanity. What friendship can last without mutual respect? The friendship of Frederic and Voltaire was hopelessly broken, in spite of the remembrance of mutual admiration and happy hours. It was patched up and mended like a broken vase, but it could not be restored. How sad, how mournful, how humiliating is a broken friendship or an alienated love! It is the falling away of the foundations of the soul, the disappearance forever of what is most to be prized on earth,--its celestial certitudes. A beloved friend may die, but we are consoled in view of the fact that the friendship may be continued in heaven: the friend is not lost to us. But when a friendship or a love is broken, there is no continuance of it through eternity. It is the gloomiest thing to think of in this whole world.

But Frederic was too busy and pre-occupied a man to mourn long for a departed joy. He was absorbed in preparations for war. The sword of Damocles was suspended over his head, and he knew it better than any other man in Europe; he knew it from his spies and emissaries. Though he had enjoyed ten years' peace, he knew that peace was only a truce; that the nations were arming in behalf of the injured empress; that so great a crime as the seizure of Silesia must be visited with a penalty; that there was no escape for him except in a tremendous life-and-death struggle, which was to be the trial of his life; that defeat was more than probable, since the forces in preparation against him were overwhelming. The curses of the civilized world still pursued him, and in his retreat at Sans-Souci he had no rest; and hence he became irritable and suspicious. The clouds of the political atmosphere were filled with thunderbolts, ready to fall upon him and crush him at any moment; indeed, nothing could arrest the long-gathering storm.

It broke out with unprecedented fury in the spring of 1756. Austria, Russia, Sweden, Saxony, and France were combined to ruin him,--the most powerful coalition of the European powers seen since the Thirty Years' War. His only ally was England,--an ally not so much to succor him as to humble France, and hence her aid was timid and incompetent.

Thus began the famous Seven Years' War, during which France lost her colonial possessions, and was signally humiliated at home,--a war which developed the genius of the elder Pitt, and placed England in the proud position of mistress of the ocean; a war marked by the largest array of forces which Europe had seen since the times of Charles V., in which six hundred thousand men were marshalled under different leaders and nations, to crush a man who had insulted Europe and defied the law of nations and the laws of God. The coalition represented one hundred millions of people with inexhaustible resources.

Now, it was the memorable resistance of Frederic II. to this vast array of forces, and his successful retention of the province he had seized, which gave him his chief claim as a hero; and it was his patience, his fortitude, his energy, his fertility of resources, and the enthusiasm with which he inspired his troops even after the most discouraging and demoralizing defeats, that won for him that universal admiration as a man which he lived to secure in spite of all his defects and crimes. We admire the resources and dexterity of an outlawed bandit, but we should remember he is a bandit still; and we confound all the laws which hold society together, when we cover up the iniquity of a great crime by the successes which have apparently baffled justice. Frederic II., by stealing Silesia, and thus provoking a great war of untold and indescribable miseries, is entitled to anything but admiration, whatever may have been his military genius; and I am amazed that so great a man as Carlyle, with all his hatred of shams, and his clear perceptions of justice and truth, should have whitewashed such a robber. I cannot conceive how the severest critic of the age should have spent the best years of his life in apologies for so bad a man, if his own philosophy had not become radically unsound, based on the abominable doctrine that the end justifies the means, and that an outward success is the test of right. Far different was Carlyle's treatment of Cromwell. Frederic had no such cause as Cromwell; it was simply his own or his country's aggrandizement by any means, or by any sword he could lay hold of. The chief merit of Carlyle's history is his impartiality and accuracy in describing the details of the contest: the cause of the contest he does not sufficiently reprobate; and all his sympathies seem to be with the unscrupulous robber who fights heroically, rather than with indignant Europe outraged by his crimes. But we cannot separate crime from its consequences; and all the reverses, the sorrows, the perils, the hardships, the humiliations, the immense losses, the dreadful calamities through which Prussia had to pass, which wrung even the heart of Frederic with anguish, were only a merited retribution. The Seven Years' War was a king-hunt, in which all the forces of the surrounding monarchies gathered around the doomed man, making his circle smaller and smaller, and which would certainly have ended in his utter ruin, had he not been rescued by events as unexpected as they were unparalleled. Had some great and powerful foe been converted suddenly into a friend at a critical moment, Napoleon, another unscrupulous robber, might not have been defeated at Waterloo, or died on a rock in the ocean. But Providence, it would seem, who rules the fate of war, had some inscrutable reason for the rescue of Prussia under Frederic, and the humiliation of France under Napoleon.

The brunt of the war fell of course upon Austria, so that, as the two nations were equally German, it had many of the melancholy aspects of a civil war. But Austria was Catholic and Prussia was Protestant; and had Austria succeeded, Germany possibly to-day would have been united under an irresistible Catholic imperialism, and there would have been no German empire whose capital is Berlin. The Austrians, in this contest, fought bravely and ably, under Prince Carl and Marshal Daun, who were no mean competitors with the King of Prussia for military laurels. But the Austrians fought on the offensive, and the Prussians on the defensive. The former were obliged to manoeuvre on the circumference, the latter in the centre of the circle. The Austrians, in order to recover Silesia, were compelled to cross high mountains whose passes were guarded by Prussian soldiers. The war began in offensive operations, and ended in defensive.

The most terrible enemy that Frederic had, next to Austria, was Russia, ruled then by Elizabeth, who had the deepest sympathy with Maria Theresa; but when she died, affairs took a new turn. Frederic was then on the very verge of ruin,--was, as they say, about to be "bagged,"--when the new Emperor of Russia conceived a great personal admiration for his genius and heroism; the Russian enmity was converted to friendship, and the Czar became an ally instead of a foe.

The aid which the Saxons gave to Maria Theresa availed but little. The population, chiefly and traditionally Protestant, probably sympathized with Prussia more than with Austria, although the Elector himself was Catholic,--that inglorious monarch who resembled in his gallantries Louis XV., and in his dilettante tastes Leo X. He is chiefly known for the number of his concubines and his Dresden gallery of pictures.

The aid which the French gave was really imposing, so far as numbers make efficient armies. But the French were not the warlike people in the reign of Louis XV. that they were under Henry IV., or Napoleon Bonaparte. They fought, without the stimulus of national enthusiasm, without a cause, as part of a great machine. They never have been successful in war without the inspiration of a beloved cause. This war had no especial attraction or motive for them. What was it to Frenchmen, so absorbed with themselves, whether a Hohenzollern or a Hapsburg reigned in Germany? Hence, the great armies which the government of France sent to the aid of Maria Theresa were without spirit, and were not even marshalled by able generals. In fact, the French seemed more intent on crippling England than in crushing Frederic. The war had immense complications. Though France and England were drawn into it, yet both France and England fought more against each other than for the parties who had summoned them to their rescue.

England was Frederic's ally, but her aid was not great directly. She did not furnish him with many troops; she sent subsidies instead, which enabled him to continue the contest. But these were not as great as he expected, or had reason to expect. With all the money he received from Walpole or Pitt he was reduced to the most desperate straits.