Henry Howard Harper, The psychology of speculation (1926)
“ A man driving an automobile at a sixty-mile-an-hour pace does not stop to read signs by the roadway; and no more does a trader bother with warnings when a prolonged series of stock market victories has blurred his vision to everything but prosperity. As every unfamiliar noise or object tends to aggravate fear in those who are frightened in the dark, so every concurrent happening stimulates courage and recklessness in those who become emboldened by stock market success. ”
