Perspective is the way something is seen. Perspective could be one's point of view on an issue, or in a more literal sense, the physical angle at which one views an object or scene. One's point of view on an issue can be affected by nurture, or one's education in general. One's literal view on an object or scene can be affected by any number of things. In real life, a person walking can obstruct your view, or an untimely blink even. That is all dependent on chance. But there are other times when one's literal view of something is manipulated intentionally. The most obvious of these situations is a film. The camera angle and the focus takes complete control of the viewer and can control the way the film is presented. The viewer has literally no control. To shift one's perspective, a change needs to occur. This can be manifested in a gain of knowledge or a physical accident. Most of the time, the change appears to be minimal, or does not apear at all, but it is there, and after a while will become more influential.