Thus provided with the means, and improved instruments, for executing his purposes, he broke out into open rebellion; and, though hostile to the _principatus_, or personal supremacy of one man, he did not feel his republican purism at all wounded by the style and title of _Imperator_,--that being a military term, and a mere titular honor, which had co-existed with the severest forms of republicanism. _Imperator_, then, he was saluted and proclaimed; and doubtless the writer of the warning letter from Syria would now declare that the sequel had justified the fears which Marcus had thought so unbecoming to a Roman emperor. But again Marcus would have said, "Let us wait for the sequel of the sequel," and that would have justified him. It is often found by experience that men, who have learned to reverence a person in authority chiefly by his offices of correction applied to their own aberrations,--who have known and feared him, in short, in his character of reformer,--will be more than usually inclined to desert him on his first movement in the direction of wrong. Their obedience being founded on fear, and fear being never wholly disconnected from hatred, they naturally seize with eagerness upon the first lawful pretext for disobedience; the luxury of revenge is, in such a case, too potent,--a meritorious disobedience too novel a temptation,--to have a chance of being rejected. Never, indeed, does erring human nature look more abject than in the person of a severe exactor of duty, who has immolated thousands to the wrath of offended law, suddenly himself becoming a capital offender, a glozing tempter in search of accomplices, and in that character at once standing before the meanest of his own dependents as a self-deposed officer, liable to any man's arrest, and, _ipso facto_, a suppliant for his own mercy. The stern and haughty Cassius, who had so often tightened the cords of discipline until they threatened to snap asunder, now found, experimentally, the bitterness of these obvious truths. The trembling sentinel now looked insolently in his face; the cowering legionary, with whom "to hear was to obey," now mused or even bandied words upon his orders; the great lieutenants of his office, who stood next to his own person in authority, were preparing for revolt, open or secret, as circumstances should prescribe; not the accuser only, but the very avenger, was upon his steps; Nemesis, that Nemesis who once so closely adhered to the name and fortunes of the lawful Cæsar, turning against every one of his assassins the edge of his own assassinating sword, was already at his heels; and in the midst of a sudden prosperity, and its accompanying shouts of gratulation, he heard the sullen knells of approaching death. Antioch, it was true, the great Roman capital of the Orient, bore him, for certain motives of self-interest, peculiar good-will. But there was no city of the world in which the Roman Cæsar did not reckon many liege-men and partisans.