Perspective changes the way you see yourself because different angles can tell different stories. For example, my first picture is of my shoes and not really of my face. Unless I told you, you might not know it was of me. Taking pictures of my shoes can seal my identity, and add a little mystery to the photo. The way my shoes are positioned can tell a story as well. Instead of both feet being planted on the ground, the shoes are at different levels which can portray uncertainty or insecurity.
The second picture is a birds eye view of myself, clearly you can tell it's a picture of me and serves a different purpose than the first picture. Different perspectives serve diferent purposes and a slightly different angle can change the message or story the photographer is trying to display. The story of the second picture is the complete opposite of the first. The second picture is of my face and I'm smilling, a reader can assume the subject is happy or confident rather than uncertain and insecure like the first.
Although the subject in each picture is of me, different angles and perspective can change how i'm viewed and perceived by a reader.