Foreword: Life is tension or the result of tension: without tension the creative impulse cannot exist. If human life be taken as the result of tension between the two polarities night and day, night, the negative pole, must share equal importance with the positive day. At night, under the influence of cosmic radiations quite different from those of the day, human affairs are apt to come to a crisis. At night most human beings die and are 
Anna Kavan, Sleep Has His House
language, nighttime, writing-process