we have memory

 

Memory is the faculty of the brain by which data or information is encoded, stored, and retrieved when needed. It is the retention of information over time for the purpose of influencing future action. If past events could not be remembered, it would be impossible for language, relationships, or personal identity, to develop. Memory loss is usually described as forgetfulness or amnesia. - wikipedia

 

We hold on to memory, too many of them, some are light as a feather, others are to heavy as burden. The most memory we hold in us more often are the remember the pains. It in human nature, it always the memory of pains hold the space and time longer in our head.