[entertainme]

While we are are selfish in nature there's a large difference between being selfish and self centered.

To understand why it's wrong take it to its extreme.

If my happiness is my only concern then why not kill you and your family for what I could gain?

If my happiness is my only concern then why not hurt and disappoint you in any given situation because, after all, I'm only concerned with myself.

I may be able to be perfectly happy if I did away with Bill Gates and stole his wealth so that I would never be in need. I could even set myself up to be a beloved benefactor to millions of others if my crime were not discovered. It would probably be fulfilling to me to be adored by the masses.

Does this give you some insight as to why self centeredness is often seen as a character flaw? It's an excuse to put yourself before all others, in ways from minute to horrendous.