Primary+Source

Cicero to Atticus (Ad Att. 7.8.) Dec. 25/26, 50 {after another meeting with Pompey on the 25th} Formiae
 ....If [Caesar] should run mad, [Pompey] is utterly contemptuous of the man and in his own and the Res Publica's resources has confidence....I was relieved of worry, hearing a man—brave and experienced and most strong in authority—discoursing like a statesman upon the dangers of a simulated peace. We had moreover in our hands [Mark] Antony's speech made on Dec. 21, in which there was an attack on Pompey even from his boyhood, a complaint about some condemned men and a frightening [threat] of arms. Concerning this, [Pompey] said, "What do you judge that he himself will do, if into his possession the Res Publica comes, when this quaestor of his—sickly and helpless—dares to speak [in this way]?" What more? Not only does he not seem to look out for peace, but he even seems to fear it....To me however this is the most annoying thing: that there is money which I must pay to Caesar....For it is bad form to be one's political opponent's debtor....  This was a letter from Cicero to Atticus discussing Pompey and Caeser's activity towards each other. Pompey and Caeser were both part of the 1st Triumverate. This letter clearly shows that these two oppose each other. It was said that it is useless for Pompey to display a fake alliance with Caeser. Pompey feels that with the power of the Republic behind him that he can defeat Caeser and the war between them continues. This letter shows the resentment between these two super powers and some of their acts towards each other.