There has long been a saying that our memory is a mysterious treasure house. All the experiences in our lives are collected in this treasure house. Usually, many memories are suppressed by consciousness, making us unable to remember them. We have to wait until the right opportunity comes before they can be recalled. The treasure house of memory is like the locked treasure in “One Thousand and One Nights”. Only Alibaba must recite the correct spell “Open Sesame”, and the door of the treasure cave will open. 　　Supporting this statement is the fact that we do often and inexplicably recall many distant, almost forgotten events in astonishing detail. For example,…