But Brutus was roused up and pushed on to the undertaking by many persuasions of his familiar friends, and letters and invitations from unknown citizens. For under the statue of his ancestor Brutus, that overthrew the kingly government, they wrote the words, "O that we had a Brutus now!" and, "O that Brutus were alive!" And Brutus's own tribunal, on which he sat as praetor, was filled each morning with writings such as these: "You are asleep, Brutus," and, "You are not a true Brutus." Now the flatterers of Caesar were the occasion of all this, who, among other invidious honours which they strove to fasten upon Caesar, crowned his statues by night with diadems, wishing to incite the people to salute him king instead of dictator. But quite the contrary came to pass, as I have more particularly related in the life of Caesar.
When Cassius went about soliciting friends to engage in this design against Caesar, all whom he tried readily consented, if Brutus would be head of it; for their opinion was that the enterprise wanted not hands or resolution, but the reputation and authority of a man such as he was, to give as it were the first religious sanction, and by his presence, if by nothing else, to justify the undertaking; that without him they should go about this action with less heart, and should lie under greater suspicions when they had done it; for if their cause had been just and honourable, people would be sure that Brutus would not have refused it. Cassius, having considered these things with himself, went to Brutus and made him the first visit after their falling out; and after the compliments of reconciliation had passed, and former kindnesses were renewed between them, he asked him if he designed to be present on the calends of March, for it was discoursed, he said, that Caesar's friends intended then to move that he might be made king. When Brutus answered, that he would not be there, "But what," says Cassius, "if they should send for us?" "It will be my business, then," replied Brutus, "not to hold my peace, but to stand up boldly, and die for the liberty of my country." To which Cassius with some emotion answered, "But what Roman will suffer you to die? What, do you not know yourself, Brutus? Or do you think that those writings that you find upon your praetor's seat were put there by weavers and shopkeepers, and not by the first and most powerful men of Rome? From other praetors, indeed, they expect largesses and shows and gladiators, but from you they claim, as an hereditary debt, the exurpation of tyranny; they are all ready to suffer anything on your account, if you will but show yourself such as they think you are and expect you should be." Which said, he fell upon Brutus, and embraced him; and after this, they parted each to try their several friends.
Among the friends of Pompey there was one Caius Ligarius, whom Caesar had pardoned, though accused for having been in arms against him. This man, not feeling so thankful for having been forgiven as he felt oppressed by that power which made him need a pardon, hated Caesar, and was one of Brutus's most intimate friends. Him Brutus visited, and finding him sick, "O Ligarius," says he, "what a time you have found out to be sick in!" At which words Ligarius, raising himself and leaning on his elbow, took Brutus by the hand, and said, "But, O Brutus, if you are on any design worthy of yourself, I am well."From this time they tried the inclinations of all their acquaintances that they durst trust, and communicated the secret to them, and took into the design not only their familiar friends, but as many as they believed bold and brave and despisers of death. For which reason they concealed the plot from Cicero, though he was very much trusted and as well beloved by them all, lest, to his own disposition, which was naturally timorous, adding now the weariness and caution of old age, by his weighing, as he would do, every particular, that he might not make one step without the greatest security, he should blunt the edge of their forwardness and resolution in a business which required all the despatch imaginable. As indeed there were also two others that were companions of Brutus, Statilius the Epicurean, and Favonius the admirer of Cato, whom he left out for this reason: as he was conversing one day with them, trying them at a distance, and proposing some such question to be disputed of as among philosophers, to see what opinion they were of, Favonius declared his judgment to be that a civil war was worse than the most illegal monarchy; and Statilius held, that to bring himself into troubles and danger upon the account of evil or foolish men did not become a man that had any wisdom or discretion. But Labeo, who was present, contradicted them both and Brutus, as if it had been an intricate dispute, and difficult to be decided, held his peace for that time, but afterwards discovered the whole design to Labeo, who readily undertook it. The next thing that was thought convenient was to gain the other Brutus surnamed Albinus, a man of himself of no great bravery or courage, but considerable for the number of gladiators that he was maintaining for a public show, and the great confidence that Caesar put in him. When Cassius and Labeo spoke with him concerning the matter, he gave them no answer; but, seeking an interview with Brutus himself alone, and finding that he was their captain, he readily consented to partake in the action. And among the others, also, the most and best were gained by the name of Brutus. And, though they neither gave nor took any oath of secrecy, nor used any other sacred rite to assure their fidelity to each other, yet all kept their design so close, were so wary, and held it so silently among themselves that, though by prophecies and apparitions and signs in the sacrifices the gods gave warning of it, yet could it not be believed.