Cicero, Philippics 2.64
Caesar Alexandria se recepit felix, ut sibi quidem videbatur; mea autem sententia, qui rei publicae sit hostis, felix esse nemo potest.
Caesar came back from Alexandria a fortunate man – in his own opinion at least. But my feeling is that no man who is an enemy of the state can be a fortunate man.
Caesar returned from Alexandria in 47 BC, having pursued Pompey there after the latter’s defeat at the battle of Pharsalus.