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The rejection of reason as the source of meaning is a common theme of existentialist thought , as is the focus on the anxiety and dread that we feel in the face of our own radical freedom and our awareness of death .
 anxiety
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 anxiety