The ego is the self as contrasted by another self. Once the ego has developed, it is responsible for mediating between the unrealistic id and the reality. It uses reality to help the id satisfy its demands and to obtain what the ego seeks. Much like the id, the ego seeks out pleasure by reducing tension that has been created and avoids pain. Some other characteristics of the ego are:
Modified by direct influences
Decision-making component of the personality
Works by reason
Waits for gratification and satisfaction to avoid negative consequences
No concept of right or wrong
Something is good as long as there is no harm to self or id
Weak compared to the id
Failure to use the reality principle, will experience anxiety
Works by rational, realistic, and orientated towards problem solving