Nostalgia

Nostalgia is an emotion which is invoked by past emotional memories referenced by new experience, creating a complex picture of idealized past scenes in the viewer's mind. Nostalgia can be contrasted with trauma recall, with nostalgia being a positive version of it, though its sentimental overtones can be emotionally overwhelming for many. Nostalgia is often often combined with moods of deep reminiscence and "retreat"(into the comfortable past), where people are absorbed in past memories and affairs, ignoring the reality around them as it appears insignificant to emotional subtext occupied by the past scenario.