Quote by Benjamin Franklin
There are three things extremely hard: steel, a diamond, and to know one's self.
Summary
This quote suggests that there are three exceptional challenges in life: the hard material properties of steel and diamond, and the difficulty of truly understanding oneself. It implies that self-awareness is an arduous task, perhaps due to the complexity of human emotions, thoughts, and motivations. Just as steel and diamond possess qualities that make them seemingly impenetrable, comprehending one's own nature and inner workings requires deep introspection and self-reflection.