What gives continuity to fear? I have had physical pain a week ago and I am afraid it might return. That is the past and the future. What sustains this fear? I have had bad pain a week ago; it is finished but thought goes on with it, carries on, thinking it might come back. Thought, which is the response of memory of the pain it had a week ago, says, ‘It might come back.’ So thought sustains, gives nourishment to fear. It gives a continuity to fear. Thinking about what happened a week ago, or what might happen tomorrow, breeds fear.