Memory is the process in which information is stored, organized, and retrieved in our brains. We use our existing memories everyday to remember when to wake up, what homework is due, and what classes we have to attend. Besides remembering daily routines we also have a long term memory which can store much larger amounts of information for potentially a whole life time. Our brains sometimes forget moments and past interactions just as often as it keeps them. Transience is the degrading of memories due to the passing of time while absentmindedness is the failure to retain a memory so it is impossible for your brain to retrieve them later. Other factors such as stress and sleep can affect how easily and effectively your brain encodes and stores information, sleep strengthens the neural connections in our brain making it easier to stabilize and retain memories. Memories can be complex and kept in our brains for long periods of time or simple such as looking at an item and recognizing it immediately after, this is not a cognitive control and is an automatic response of our brain taking note of our surroundings. Diseases associated with the mind can destroy memory and other important mental functions, Alzheimer disease causes brain cell connections to degenerate and die eventually discarding memory and many of the other brains' significant operations. Remembering things can be difficult and time consuming but without it we wouldn't be able to remember the important people, places, and information our vast world is constantly throwing at us.