Answer:
The central idea revealed by the motif of flattery in this passage is that self-serving individuals cannot be trusted. The conspirators said one thing while behaving in a very different manner, being hypocrites. In his speech, Antony describes how the conspirators fawned over Caesar, "kissing Caesar’s feet.” This flattery was a cover up for their true ill intentions. They revealed "vile daggers” and stabbed Caesar, betraying and killing him. By pointing out the conspirators’ use of flattery, Antony calls them hypocrites, for their actions, who used false words to further their ambitions.