Why do negative comments and conversations stick with us so much longer than positive ones?

A critique from a boss, a disagreement with a colleague, a fight with a friend – the sting from any of these can make you forget a month’s worth of praise or accord. If you’ve been called lazy, careless, or a disappointment, you’re likely to remember and internalize it. It’s somehow easier to forget, or discount, all the times people have said you’re talented or conscientious or that you make them proud.more here