The phrase "Keep your friends close and your enemies closer" is often attributed to Sun Tzu, an ancient Chinese military strategist, philosopher, and author of "The Art of War." However, it's important to note that there is no direct evidence that Sun Tzu actually used this exact phrase in his writings.
The saying has become popular over time and has been associated with various leaders and fictional characters in literature, films, and television. In popular culture, it is famously used by Michael Corleone in the movie "The Godfather Part II" (1974), where he says, "My father taught me many things here. He taught me in this room. He taught me: keep your friends close, but your enemies closer."
Regardless of its exact origin, the phrase conveys a strategic approach to dealing with adversaries, suggesting that it is prudent to closely monitor and understand one's enemies to better anticipate their actions and intentions.