The document discusses Hillel's Riddle, which considers one's responsibility to oneself and others. The riddle poses three questions: 1) If I am not for myself, who is for me? 2) If I am for myself alone, what am I? 3) If not now, when? It argues that how we treat ourselves is interconnected with how we treat others, and that we must see to our own needs while also considering the needs of others.