The manners of the Dutch nobility of that age wanted the grace which was found in the highest perfection among the gentlemen of France, and which, in an inferior degree, embellished the Court of England; and his manners were altogether Dutch. Even his countrymen thought him blunt. To foreigners he often seemed churlish. In his intercourse with the world in general he appeared ignorant or negligent of those arts which double the value of a favour and take away the sting of a refusal. He was little interested in letters or science. The discoveries of Newton and Leibnitz, the poems of Dryden and Boileau, were unknown to him. Dramatic performances tired him; and he was glad to turn away from the stage and to talk about public affairs, while Orestes was raving, or while Tartuffe was pressing Elmira's hand. He had indeed some talent for sarcasm, and not seldom employed, quite unconsciously, a natural rhetoric, quaint, indeed, but vigorous and original. He did not, however, in the least affect the character of a wit or of an orator. His attention had been confined to those studies which form strenuous and sagacious men of business. From a child he listened with interest when high questions of alliance, finance, and war were discussed. Of geometry he learned as much as was necessary for the construction of a ravelin or a hornwork. Of languages, by the help of a memory singularly powerful, he learned as much as was necessary to enable him to comprehend and answer without assistance everything that was said to him, and every letter which he received. The Dutch was his own tongue. He understood Latin, Italian, and Spanish. He spoke and wrote French, English, and German, inelegantly, it is true, and inexactly, but fluently and intelligibly. No qualification could be more important to a man whose life was to be passed in organizing great alliances, and in commanding armies assembled from different countries.
One class of philosophical questions had been forced on his attention by circumstances, and seems to have interested him more than might have been expected from his general character. Among the Protestants of the United Provinces, as among the Protestants of our island, there were two great religious parties which almost exactly coincided with two great political parties. The chiefs of the municipal oligarchy were Arminians, and were commonly regarded by the multitude as little better than Papists.
The princes of Orange had generally been the patrons of the Calvinistic divinity, and owed no small part of their popularity to their zeal for the doctrines of election and final perseverance, a zeal not always enlightened by knowledge or tempered by humanity. William had been carefully instructed from a child in the theological system to which his family was attached, and regarded that system with even more than the partiality which men generally feel for a hereditary faith. He had ruminated on the great enigmas which had been discussed in the Synod of Dort, and had found in the austere and inflexible logic of the Genevese school something which suited his intellect and his temper. That example of intolerance indeed which some of his predecessors had set he never imitated. For all persecution he felt a fixed aversion, which he avowed, not only where the avowal was obviously politic, but on occasions where it seemed that his interest would have been promoted by dissimulation or by silence. His theological opinions, however, were even more decided than those of his ancestors. The tenet of predestination was the keystone of his religion. He often declared that, if he were to abandon that tenet, he must abandon with it all belief in a superintending Providence, and must become a mere Epicurean.
Except in this single instance, all the sap of his vigorous mind was early drawn away from the speculative to the practical. The faculties which are necessary for the conduct of important business ripened in him at a time of life when they have scarcely begun to blossom in ordinary men. Since Octavius the world had seen no such instance of precocious statesmanship. Skilful diplomatists were surprised to hear the weighty observations which at seventeen the Prince made on public affairs, and still more surprised to see a lad, in situations in which he might have been expected to betray strong passion, preserve a composure as imperturbable as their own. At eighteen he sate among the fathers of the commonwealth, grave, discreet, and judicious as the oldest among them. At twenty-one, in a day of gloom and terror, he was placed at the head of the administration. At twenty-three be was renowned throughout Europe as a soldier and a politician. He had put domestic factions under his feet: he was the soul of a mighty coalition; and he had contended with honour in the field against some of the greatest generals of the age.