From the beginning of the novel, Winston is aware that his thoughts will ultimately bring about his destruction. When he writes "Down With Big Brother" in his diary he foreshadows his ultimate demise by the thoughtpolice who will get him for his thoughtcrime against Big Brother. He knows his fate but is driven by his desire to know and experience the truth, beauty and love that once existed. Throughout the novel we see Winston always on guard, always thinking the worst, as when he thinks Julia is a spy. He is so on guard with everyone that he misses the one who will ulimately bring about his downfall - O'Brian.