Though the designs of Catiline were not yet publicly known, yet considerable preliminary troubles immediately followed upon Cicero's entrance upon the consulship. For, on the one side, those who were disqualified by the laws of Sylla from holding any public offices, being neither inconsiderable in power nor in number, came forward as candidates and caressed the people for them; speaking many things truly and justly against the tyranny of Sylla, only that they disturbed the government at an improper and unseasonable time; on the other hand, the tribunes of the people proposed laws to the same purpose, constituting a commission of ten persons, with unlimited powers, in whom as supreme governors should be vested the right of selling the public lands of all Italy and Syria and Pompey's new conquests, of judging and banishing whom they pleased, of planting colonies, of taking moneys out of the treasury, and of levying and paying what soldiers should be thought needful. And several of the nobility favored this law, but especially Caius Antonius, Cicero's colleague, in hopes of being one of the ten. But what gave the greatest fear to the nobles was, that he was thought privy to the conspiracy of Catiline, and not to dislike it, because of his great debts.

Cicero, endeavoring in the first place to provide a remedy against this danger, procured a decree assigning to him the province of Macedonia, he himself declining that of Gaul, which was offered to him. And this piece of favor so completely won over Antonius, that he was ready to second and respond to, like a hired player, whatever Cicero said for the good of the country. And now, having made his colleague thus tame and tractable, he could with greater courage attack the conspirators. And, therefore, in the senate, making an oration against the law of the ten commissioners, he so confounded those who proposed it, that they had nothing to reply. And when they again endeavored, and, having prepared things beforehand, had called the consuls before the assembly of the people, Cicero, fearing nothing, went first out, and commanded the senate to follow him, and not only succeeded in throwing out the law, but so entirely overpowered the tribunes by his oratory, that they abandoned all thought of their other projects.

For Cicero, it may be said, was the one man, above all others, who made the Romans feel how great a charm eloquence lends to what is good, and how invincible justice is, if it be well spoken; and that it is necessary for him who would dexterously govern a commonwealth, in action, always to prefer that which is honest before that which is popular, and in speaking, to free the right and useful measure from everything that may occasion offense. An incident occurred in the theater, during his consulship, which showed what his speaking could do. For whereas formerly the knights of Rome were mingled in the theater with the common people, and took their places amongst them as it happened, Marcus Otho, when he was praetor, was the first who distinguished them from the other citizens, and appointed them a proper seat, which they still enjoy as their special place in the theater. This the common people took as an indignity done to them, and, therefore, when Otho appeared in the theater, they hissed him; the knights, on the contrary, received him with loud clapping. The people repeated and increased their hissing; the knights continued their clapping. Upon this, turning upon one another, they broke out into insulting words, so that the theater was in great disorder. Cicero, being informed of it, came himself to the theater, and summoning the people into the temple of Bellona, he so effectually chid and chastised them for it, that, again returning into the theater, they received Otho with loud applause, contending with the knights who should give him the greatest demonstrations of honor and respect.