All people have definite concepts of self.
In different situations, one may feel short, tall, smart, slow, fast, talkative, reserved, etceteras. These self-concepts are usually very different than how others opinions of us. Depending on one's actions, words or even tone of voice, one may misrepresent oneself and be misinterpreted. One may be so arrogant or so humble that they prevent themselves from seeing themselves through others' eyes. Their inability to project their true motives in performing certain actions eventually brings about their tragic downfalls.