One can teach about philosophy or about what philosophers have said, and one can expound one’s own philosophical views. But, philosophy itself isn’t a body of knowledge which can be imparted like the facts of science, history, or literature. In its classical sense, philosophy is a love of wisdom — of understanding, insight, and sound judgment. And the most that one can do is to encourage the cultivation of these traits in others. The hard work of developing them must be done by oneself.