1) The document is a letter from a parent to their child about caring for them in old age with patience and understanding. 2) It asks the child to be understanding if the parent repeats stories, gets dirty, refuses food or loses memory, and to help the parent as the parent once helped the child. 3) The letter expresses that at old age, people stop living and just survive, and the most important things are spending time with loved ones and receiving smiles and love.